Linux man pages: Section 8

• MAKEDEV - create devices  
• accept - accept/reject jobs sent to a destination  
• accton - turns process accounting on or off  
• acpi_listen - ACPI event listener  
• acpid - Advanced Configuration and Power Interface event daemon  
• adduser - Create a new user or update default new user information  
• adsl-connect - connect - Shell script to manage a PPPoE link  
• adsl-setup - setup - Shell script to configure Roaring Penguin PPPoE client  
• adsl-start - start - Shell script to bring up a PPPoE link  
• adsl-status - status - Shell script to report on status of PPPoE link  
• adsl-stop - stop - Shell script to shut down a PPPoE link  
• agetty - alternative Linux getty  
• alternatives - maintain symbolic links determining default commands  
• anacron - runs commands periodically  
• apachectl - Apache HTTP Server Control Interface  
• apmd - Advanced Power Management (APM) daemon  
• arp - manipulate the system ARP cache  
• arping - send ARP REQUEST to a neighbour host  
• arptables-restore - restore - Restore ARP Tables  
• arptables-save - save - Save ARP Tables  
• arptables - administration tool for arp packet filtering  
• atd - run jobs queued for later execution  
• atrun - run jobs queued for later execution  
• auditctl - a utility to assist controlling the kernel's audit system  
• auditd - The Linux audit daemon  
• auditd.conf - audit daemon configuration file  
• aureport - a tool that produces summary reports of audit daemon logs  
• ausearch - a tool to query audit daemon logs  
• authconfig - an interface for configuring system authentication resources  
• autofs - Control Script for automounter  
• automount - configure mount points for autofs  
• autrace - a program similar to strace  
• avcstat - Display SELinux AVC statistics  
• avmcapictrl - Add, reset or remove active AVM cards and load firmware  
• badblocks - search a device for bad blocks  
• blkid - command-line utility to locate/print block device attributes  
• blockdev - call block device ioctls from the command line  
• booleans - Policy booleans enable runtime customization of SELinux policy.  
• callback - call a user back, presenting a login prompt  
• capiinfo - Show supported features of all installed CAPI2.0 controllers  
• capiplugin - Plugin for pppd (Point-to-Point Protocol daemon)  
• cardctl - PCMCIA card control utility  
• cardmgr - PCMCIA device manager  
• change_console - change console used by init  
• chat - Automated conversational script with a modem  
• checkpolicy - SELinux policy compiler  
• chkconfig - updates and queries runlevel information for system services  
• chkfontpath - simple interface for adding, removing, and listing directories in the X font server's path  
• chpasswd - update password file in batch  
• clockdiff - measure clock difference between hosts  
• consolehelper - A wrapper that helps console users run system programs  
• convertquota - convert quota from old file format to new one  
• crash - Analyze Linux crash data or a live system  
• cron - daemon to execute scheduled commands (ISC Cron V4.1)  
• crond - daemon to execute scheduled commands (ISC Cron V4.1)  
• ctrlaltdel - set the function of the Ctrl-Alt-Del combination  
• cups-lpd - lpd - receive print jobs and report printer status to lpd clients  
• cups-polld - polld - cups printer polling daemon  
• cupsaccept - accept/reject jobs sent to a destination  
• cupsaddsmb - export printers to samba for windows clients  
• cupsd - common unix printing system daemon  
• cupsdisable - stop/start printers and classes  
• cupsenable - stop/start printers and classes  
• cupsreject - accept/reject jobs sent to a destination  
• cytune - Tune Cyclades driver parameters  
• debugfs - ext2/ext3 file system debugger  
• depmod - - program to generate modules.dep and map files.  
• dhclient-script - script - DHCP client network configuration script  
• dhclient - Dynamic Host Configuration Protocol Client  
• dhcp6c - DHCPv6 client daemon  
• disable - stop/start printers and classes  
• diskdumpctl - diskdump controller  
• diskdumpfmt - format a dump device or a partition  
• distcache - Distributed session caching  
• dmesg - print or control the kernel ring buffer  
• dmraid - discover and activate software (ATA)RAID  
• dmsetup - low level logical volume management  
• dnssec-keygen - keygen - DNSSEC key generation tool  
• dnssec-makekeyset - makekeyset - DNSSEC zone signing tool  
• dnssec-signkey - signkey - DNSSEC key set signing tool  
• dnssec-signzone - signzone - DNSSEC zone signing tool  
• dosfsck - check and repair MS-DOS file systems  
• dump - ext2/3 filesystem backup  
• dump_cis - display PCMCIA Card Information Structures  
• dumpe2fs - dump ext2/ext3 filesystem information  
• e2image - Save critical ext2/ext3 filesystem data to a file  
• e2label - Change the label on an ext2/ext3 filesystem  
• edquota - edit user quotas  
• elvtune - I/O elevator tuner  
• enable - stop/start printers and classes  
• ethtool - Display or change ethernet card settings  
• execstack - tool to set, clear, or query executable stack flag of ELF binaries and shared libraries  
• exportfs - maintain list of NFS exported file systems  
• ext2online - online (mounted) ext2 filesystem resizer  
• faillog - examine faillog and set login failure limits  
• fbset - show and modify frame buffer device settings  
• fdformat - Low-level formats a floppy disk  
• fdisk - Partition table manipulator for Linux  
• filefrag - report on file fragmentation  
• findchip - checks the FIR chipset.  
• findfs - Find a filesystem by label or UUID  
• fingerd - remote user information server  
• fixfiles - fix file security contexts.  
• floppy - format floppy disks  
• foomatic-addpjloptions - addpjloptions - Format PJL option information the for foomatic database  
• foomatic-getpjloptions - getpjloptions - <put a short description here>  
• foomatic-kitload - kitload - installs a data kit into the foomatic database.  
• foomatic-ppdload - ppdload - <put a short description here>  
• foomatic-preferred-driver - preferred-driver - <put a short description here>  
• fsck - check and repair a Linux file system  
• fsck.vfat - check and repair MS-DOS file systems  
• fstab-sync - sync - Update the /etc/fstab file in response to HAL events  
• fxload - Firmware download to EZ-USB devices  
• getenforce - get the current mode of SELinux  
• getkeycodes - print kernel scancode-to-keycode mapping table  
• getsebool - get SELinux boolean value(s)  
• gpm - a cut and paste utility and mouse server for virtual consoles  
• groupadd - Create a new group  
• groupdel - Delete a group  
• groupmod - Modify a group  
• grpck - verify integrity of group files  
• grpconv - convert to and from shadow passwords and groups.  
• grpunconv - convert to and from shadow passwords and groups.  
• grub-install - install - install GRUB on your drive  
• grub-md5-crypt - md5-crypt - Encrypt a password in MD5 format  
• grub-terminfo - terminfo - Generate a terminfo command from a terminfo name  
• grub - the grub shell  
• grubby - command line tool for configuring grub, lilo, and elilo  
• gssd - rpcsec_gss daemon  
• halt - stop the system.  
• hciattach - attach serial devices via UART HCI to BlueZ stack  
• hciconfig - configure Bluetooth devices  
• hcid - Bluetooth Host Controller Interface Daemon  
• hcidump - Parse HCI data  
• hdparm - get/set hard disk parameters  
• hid2hci - Bluetooth HID to HCI mode switching utility  
• hisaxctrl - configure HiSax-Module  
• hotplug - Linux hotplugging support scripts  
• htdigconfig - script to create fuzzy databases for ht://Dig  
• httpd - Apache Hypertext Transfer Protocol Server  
• httpd_selinux - Security Enhanced Linux Policy for the httpd daemon  
• hwclock - query and set the hardware clock (RTC)  
• i2cdetect - detect I2C chips  
• i2cdump - examine I2C registers  
• i2cset - set I2C registers  
• icnctrl - configure ICN ISDN adaptor  
• idmapd - NFSv4 ID <-> Name Mapper  
• ifconfig - configure a network interface  
• ifrename - rename network interfaces based on various static criteria  
• imon - watch ISDN activities  
• imontty - display status of all ISDN lines  
• in.fingerd - remote user information server  
• in.tftpd - IPv4 Trivial File Transfer Protocol server  
• init - process control initialization  
• insmod - - simple program to insert a module into the Linux Kernel  
• install-catalog - catalog - Manage a SGML or XML centralized catalog  
• intltool-extract - extract - generate header files which can be read by gettext  
• intltool-merge - merge - merge translated strings into various types of file  
• intltool-prepare - prepare - Prepare software to make use of intltool  
• intltool-update - update - updates PO template file and merge translations with it  
• intltoolize - copy intltool related files to software package  
• intro - Introduction to administration and privileged commands  
• ip - show / manipulate routing, devices, policy routing and tunnels  
• ipcrm - remove a message queue, semaphore set or shared memory id  
• ipcs - provide information on ipc facilities  
• ipppd - (ISDN) Point to Point Protocol daemon  
• ipppstats - print PPP statistics  
• iprofd - Modem-register daemon  
• iptables-restore - restore - Restore IP Tables  
• iptables-save - save - Save IP Tables  
• iptables - administration tool for IPv4 packet filtering and NAT  
• iptraf - Interactive Colorful IP LAN Monitor  
• iptstate - A top-like display of IP Tables state table entries  
• irattach - - binds the Linux-IrDA stack to a IrDA port
     
• irdadump - monitors the IrDA traffic on one or more links.  
• irdaping - sends IrDA test frames  
• irnetd - Handle automatically incoming IrNET connections  
• irpsion5 - IrDA connectivity to a Psion V PDA  
• isadump - examine ISA registers  
• isaset - set ISA registers  
• isdnctrl - get/set ISDN device information  
• isdnlog - isdn log system (and more)  
• isosize - outputs the length of a iso9660 file system  
• iwconfig - configure a wireless network interface  
• iwevent - Display Wireless Events generated by drivers and setting changes  
• iwgetid - Report ESSID, NWID or AP/Cell Address of wireless network  
• iwlist - Get more detailed wireless information from a wireless interface  
• iwpriv - configure optionals (private) parameters of a wireless network interface  
• iwspy - Get wireless statistics from specific nodes  
• kbdrate - reset the keyboard repeat rate and delay time  
• killall5 - send a signal to all processes.  
• klogd - Kernel Log Daemon  
• kudzu - detects and configures new and/or changed hardware on a system  
• lastlog - examine lastlog file  
• ld.so - linux.so* - dynamic linker/loader  
• ldconfig - configure dynamic linker run time bindings  
• load_policy - load a newly compiled policy into the kernel  
• loadunimap - load the kernel unicode-to-font mapping table  
• lockd - start kernel lockd process  
• logrotate - rotates, compresses, and mails system logs  
• logsave - save the output of a command in a logfile  
• logwatch - system log analyzer and reporter  
• loopctrl - configure isdnloop ISDN driver  
• losetup - set up and control loop devices  
• lpadmin - configure cups printers and classes  
• lpc-cups - line printer control program  
• lpc - line printer control program  
• lpinfo - show available devices or drivers  
• lpmove - move a job to a new destination  
• lsmod - - program to show the status of modules in the Linux Kernel  
• lsof - list open files  
• lspci - list all PCI devices  
• lsusb - list all USB devices  
• lvchange - change attributes of a logical volume  
• lvcreate - create a logical volume in an existing volume group  
• lvdisplay - display attributes of a logical volume  
• lvextend - extend the size of a logical volume  
• lvm - LVM2 tools  
• lvmchange - change attributes of the logical volume manager  
• lvmdiskscan - scan for all devices visible to LVM2  
• lvreduce - reduce the size of a logical volume  
• lvremove - remove a logical volume  
• lvrename - rename a logical volume  
• lvresize - resize a logical volume  
• lvs - report information about logical volumes  
• lvscan - scan (all disks) for logical volumes  
• lwresd - lightweight resolver daemon  
• magicfilter - automatic configurable printer filter  
• mailstats - display mail statistics  
• makemap - create database maps for sendmail  
• makewhatis - Create the whatis database  
• mapscrn - load screen output mapping table  
• mdadm - manage MD devices aka Linux Software Raid.  
• mdmpd - daemon to monitor MD multipath devices  
• mgetty - smart modem getty  
• microcode_ctl - microcode utility for Intel IA32 processors  
• mii-tool - tool - view, manipulate media-independent interface status  
• mingetty - minimal getty for consoles  
• mkbootdisk - creates a stand-alone boot floppy for the running system  
• mkdosfs - create an MS-DOS file system under Linux  
• mkfs - build a Linux file system  
• mkfs.msdos - create an MS-DOS file system under Linux  
• mkfs.vfat - create an MS-DOS file system under Linux  
• mkinitrd - creates initial ramdisk images for preloading modules  
• mklost+found - create a lost+found directory on a mounted Linux second extended file system  
• mkswap - set up a Linux swap area  
• mkzonedb - Utility create a zone file for isdnlog  
• modinfo - - program to show information about a Linux Kernel module  
• modprobe - program to add and remove modules from the Linux Kernel  
• module_upgrade - changes obsolete modules.conf entries to current ones  
• mount - mount a file system  
• mount.cifs - mount using the Common Internet File System (CIFS)  
• mountd - NFS mount daemon  
• mtr - a network diagnostic tool  
• named-checkconf - checkconf - named configuration file syntax checking tool  
• named-checkzone - checkzone - zone file validity checking tool  
• named - Internet domain name server  
• named_selinux - Security Enhanced Linux Policy for the Internet Name server (named) daemon  
• nameif - name network interfaces based on MAC addresses  
• nash - script interpretor to interpret linuxrc images  
• net - Tool for administration of Samba and remote CIFS servers.  
• netdump - send oops data and memory dumps over the network  
• netplugd - network cable hotplug management daemon  
• netstat - Print network connections, routing tables, interface statistics, masquerade connections, and multicast memberships  
• newusers - update and create new users in batch  
• nfsd - NFS server process  
• nfsstat - print NFS statistics  
• nhfsgraph - Run nhfsstone over multiple loads  
• nhfsnums - Convert nhfsrun output to plot(5)  
• nhfsrun - Run nhfsstone over multiple loads  
• nhfsstone - Network File System benchmark program  
• nmbd - NetBIOS name server to provide NetBIOS over IP naming services to clients  
• nologin - politely refuse a login  
• nscd - name service cache daemon  
• nsupdate - Dynamic DNS update utility  
• ntsysv - simple interface for configuring runlevels  
• numactl - Control NUMA policy for processes or shared memory  
• pack_cis - compile PCMCIA Card Information Structures  
• pam - PAM - Pluggable Authentication Modules for Linux  
• pam_auth - Squid PAM authentication helper  
• pam_console - control permissions for users at the system console  
• pam_console_apply - set or revoke permissions for users at the system console  
• pam_krb5 - Kerberos 5 authentication  
• pam_localuser - require users to be listed in /etc/passwd  
• pam_loginuid - record user's login uid to the process attribute  
• pam_passwdqc - Password quality-control PAM module  
• pam_postgresok - simple check of real UID and corresponding account name  
• pam_rps - challenge-response authentication  
• pam_selinux - set the default security context after login via PAM.  
• pam_selinux_check - login program to test pam_selinux_check  
• pam_stack - recurse into other PAM stacks  
• pam_succeed_if - succeed or fail based on account characteristics  
• pam_timestamp - authenticate using cached successful authentication attempts  
• pam_timestamp_check - check or clear authentication timestamps  
• pam_winbind - PAM module for Winbind  
• pam_xauth - forward xauth keys between users  
• parted - a partition manipulation program  
• partprobe - inform the OS of partition table changes  
• pcbitctl - PCBIT-D firmware loader  
• pdbedit - manage the SAM database (Database of Samba Users)  
• pidof - find the process ID of a running program.  
• ping - send ICMP ECHO_REQUEST to network hosts  
• pivot_root - change the root file system  
• plipconfig - fine tune PLIP device parameters  
• pmap_dump - print a list of all registered RPC programs  
• pmap_set - set the list of registered RPC programs  
• portmap - DARPA port to RPC program number mapper  
• poweroff - stop the system.  
• ppp-watch - watch - daemon to make PPP interfaces act more like other interfaces  
• pppd - Point-to-Point Protocol Daemon  
• pppdump - convert PPP record file to readable format  
• pppoe-relay - relay - user-space PPPoE relay agent.  
• pppoe-server - server - user-space PPPoE server  
• pppoe-sniff - sniff - examine network for non-standard PPPoE frames  
• pppoe - user-space PPPoE client.  
• pppstats - print PPP statistics  
• praliases - display system mail aliases  
• prelink - prelink ELF shared libraries and binaries to speed up startup time  
• pvchange - change attributes of a physical volume  
• pvcreate - initialize a disk or partition for use by LVM  
• pvdisplay - display attributes of a physical volume  
• pvmove - move physical extents  
• pvremove - remove a physical volume  
• pvresize - resize a disk or partition in use by LVM2  
• pvs - report information about physical volumes  
• pvscan - scan all disks for physical volumes  
• pwck - verify integrity of password files  
• pwconv - convert to and from shadow passwords and groups.  
• pwunconv - convert to and from shadow passwords and groups.  
• pxeboot - Network Booting Operating Systems Configuration Utility  
• pxeos - PXEBoot Operating System description Configuration Utility  
• quotacheck - scan a filesystem for disk usage, create, check and repair quota files  
• quotaon - turn filesystem quotas on and off  
• quotastats - Program to query quota statistics  
• racoon - IKE (ISAKMP/Oakley) key management daemon  
• ramsize - query/set image root device, RAM disk size, or video mode  
• raw - bind a Linux raw character device  
• rawdevices - bind a Linux raw character device  
• rdev - query/set image root device, RAM disk size, or video mode  
• rdisc - network router discovery daemon  
• rdist - remote file distribution server program  
• rdump - ext2/3 filesystem backup  
• reboot - stop the system.  
• reject - accept/reject jobs sent to a destination  
• renice - alter priority of running processes  
• repquota - summarize quotas for a filesystem  
• resize2fs - ext2/ext3 file system resizer  
• resizecons - change kernel idea of the console size  
• restore - restore files or file systems from backups made with dump  
• restorecon - set file security contexts.  
• rhn_check - check for queued actions on RHN and execute them  
• rhnreg_ks - a program for non interactively registering systems to Red Hat Network  
• rhnsd - a program for querying the Red Hat Network for updates and information  
• rmail - handle remote mail received via uucp  
• rmmod - - simple program to remove a module from the Linux Kernel  
• rmt - remote magtape protocol module  
• rndc-confgen - confgen - rndc key generation tool  
• rndc - name server control utility  
• rngd - Check and feed random data from hardware device to kernel random device  
• rootflags - query/set image root device, RAM disk size, or video mode  
• rotatelogs - Piped logging program to rotate Apache logs  
• route - show / manipulate the IP routing table  
• rpc.gssd - rpcsec_gss daemon  
• rpc.idmapd - NFSv4 ID <-> Name Mapper  
• rpc.lockd - start kernel lockd process  
• rpc.mountd - NFS mount daemon  
• rpc.nfsd - NFS server process  
• rpc.statd - NSM status monitor  
• rpc.svcgssd - server-side rpcsec_gss daemon  
• rpcinfo - report RPC information  
• rpm - RPM Package Manager  
• rpm2cpio - Extract cpio archive from RPM Package Manager (RPM) package.  
• rpmbuild - Build RPM Package(s)  
• rpmcache - Cache RPM Package Headers  
• rpmdeps - Generate RPM Package Dependencies  
• rpmgraph - Display RPM Package Dependency Graph  
• rquotad - remote quota server  
• rrestore - restore files or file systems from backups made with dump  
• run_init - run an init script in the proper context  
• runlevel - find the current and previous system runlevel.  
• rvnamed - reverse name resolution daemon for iptraf(8)  
• sa - summarizes accounting information  
• saslauthd - sasl authentication server  
• sasldblistusers - list users in sasldb  
• sasldblistusers2 - list users in sasldb  
• saslpasswd - set a user's sasl password  
• saslpasswd2 - set a user's sasl password  
• savecore - save a diskdump image.  
• scrollkeeper-preinstall - preinstall - generate on OMF file, based on an existing OMF file, which has the correct URL for a document  
• scrollkeeper-rebuilddb - rebuilddb - rebuild the scrollkeeper document catalog database  
• scrollkeeper-update - update - identify new, modified, or removed OMF files and update the scrollkeeper databases  
• scsi_id - retrieve and generate a unique SCSI identifier  
• sdpd - - SDP daemon  
• selinux - NSA Security-Enhanced Linux (SELinux)  
• selinuxenabled - tool to be used within shell scripts to determine if selinux is enabled  
• sendmail - an electronic mail transport agent  
• sendmail.sendmail - an electronic mail transport agent  
• sensors-detect - detect - detect hardware monitoring chips  
• sestatus - SELinux status tool  
• setarch - change reported architecture in new program environment and set personality flags  
• setenforce - modify the mode SELinux is running in.  
• setfdprm - sets user-provided floppy disk parameters  
• setfiles - set file security contexts.  
• setfont - load EGA/VGA console screen font  
• setkey - manually manipulate the IPsec SA/SP database  
• setkeycodes - load kernel scancode-to-keycode mapping table entries  
• setpci - configure PCI devices  
• setquota - set disk quotas  
• setsebool - set SELinux boolean value  
• setserial - get/set Linux serial port information  
• setsid - run a program in a new session  
• sfdisk - Partition table manipulator for Linux  
• sftp-server - server - SFTP server subsystem  
• showconsolefont - Show the current EGA/VGA console screen font  
• showmount - show mount information for an NFS server  
• shutdown - bring the system down  
• slattach - attach a network interface to a serial line  
• sln - static ln  
• smartctl - Control and Monitor Utility for SMART Disks  
• smartd - SMART Disk Monitoring Daemon  
• smbd - server to provide SMB/CIFS services to clients  
• smbmnt - helper utility for mounting SMB filesystems  
• smbmount - mount an smbfs filesystem  
• smbpasswd - change a user's SMB password  
• smbspool - send a print file to an SMB printer  
• smbumount - smbfs umount for normal users  
• smrsh - restricted shell for sendmail  
• snmpd - daemon to respond to SNMP request packets.  
• snmptrapd - Receive and log SNMP trap messages.  
• squid - proxy caching server  
• squid_ldap_auth - Squid LDAP authentication helper  
• squid_ldap_group - Squid LDAP external acl group helper  
• squid_unix_group - Squid UNIX Group external_acl helper  
• ssh-keysign - keysign - ssh helper program for hostbased authentication  
• sshd - OpenSSH SSH daemon  
• statd - NSM status monitor  
• stinit - initialize SCSI magnetic tape drives  
• stunnel - universal SSL tunnel  
• sudo - execute a command as another user  
• suexec - Switch user before executing external programs  
• sulogin - Single-user login  
• svcgssd - server-side rpcsec_gss daemon  
• swapoff - enable/disable devices and files for paging and swapping  
• swapon - enable/disable devices and files for paging and swapping  
• symlinks - symbolic link maintenance utility  
• sync - synchronize data on disk with memory  
• sys-unconfig - unconfig - shell script to reconfigure the system upon next boot  
• sysctl - configure kernel parameters at runtime  
• sysklogd - Linux system logging utilities.  
• syslogd - Linux system logging utilities.  
• system-config-date - config-date - graphical interface for changing system date and time  
• system-config-netboot - config-netboot - Network Booting Configuration Utility  
• system-config-services - config-services - Service Configuration Utility  
• system-config-users - config-users - User and Group Management tool  
• system-logviewer - logviewer - graphical interface for viewing log files  
• tc-cbq-details - Class Based Queueing  
• tc-cbq - Class Based Queueing  
• tc-htb - Hierarchy Token Bucket  
• tc-pbfifo - Packet limited First In, First Out queue bfifo - Byte limited First In, First Out queue  
• tc-pfifo_fast - three-band first in, first out queue  
• tc-prio - Priority qdisc  
• tc-red - Random Early Detection  
• tc-sfq - Stochastic Fairness Queueing  
• tc-tbf - Token Bucket Filter  
• tc - show / manipulate traffic control settings  
• tcpd - access control facility for internet services  
• tcpdump - dump traffic on a network  
• tcpslice - extract pieces of and/or glue together tcpdump files  
• tdbbackup - tool for backing up and for validating the integrity of samba .tdb files  
• tdbdump - tool for printing the contents of a TDB file  
• telinit - process control initialization  
• tftpd - IPv4 Trivial File Transfer Protocol server  
• tmpwatch - removes files which haven't been accessed for a period of time  
• togglesebool - flip the current value of a boolean  
• tracepath - traces path to a network host discovering MTU along this path  
• traceroute - print the route packets take to network host  
• tune2fs - adjust tunable filesystem parameters on ext2/ext3 filesystems  
• tunelp - set various parameters for the lp device  
• tzselect - select a time zone  
• udev - Linux configurable dynamic device naming support  
• udevd - udev event serializer daemon and udev event sender  
• udevinfo - retrieve information from udev  
• udevsend - udev event serializer daemon and udev event sender  
• udevstart - populate initial device directory  
• udevtest - simulates a udev run to test the configured rules  
• umount - unmount file systems  
• up2date-nox - a program for updating packages on Red Hat Enterprise Linux  
• up2date - a program for updating packages on Red Hat Enterprise Linux  
• usbmodules - List kernel driver modules available for a plugged in USB device  
• useradd - Create a new user or update default new user information  
• userdel - Delete a user account and related files  
• userhelper - A helper interface to pam.  
• usermod - Modify a user account  
• usernetctl - allow a user to manipulate a network interface if permitted  
• vboxd - isdn voice box daemon  
• vboxmail - script to send notification of new voice message  
• vconfig - VLAN (802.1q) configuration program.  
• vgcfgbackup - backup volume group descriptor area  
• vgcfgrestore - restore volume group descriptor area  
• vgchange - change attributes of a volume group  
• vgck - check volume group metadata  
• vgconvert - convert volume group metadata format  
• vgcreate - create a volume group  
• vgdisplay - display attributes of volume groups  
• vgexport - make volume groups unknown to the system  
• vgextend - add physical volumes to a volume group  
• vgimport - make exported volume groups known to the system  
• vgmerge - merge two volume groups  
• vgmknodes - recreate volume group directory and logical volume special files  
• vgreduce - reduce a volume group  
• vgremove - remove a volume group  
• vgrename - rename a volume group  
• vgs - report information about volume groups  
• vgscan - scan all disks for volume groups and rebuild caches  
• vgsplit - split a volume group into two  
• vidmode - query/set image root device, RAM disk size, or video mode  
• vigr - edit the password or group files  
• vipw - edit the password or group files  
• visudo - edit the sudoers file  
• vmstat - Report virtual memory statistics  
• vsftpd - Very Secure FTP Daemon  
• warnquota - send mail to users over quota  
• winbindd - Name Service Switch daemon for resolving names from NT servers  
• xinetd - the extended Internet services daemon  
• xinetd.log - xinetd service log format  
• xqmstats - Display XFS quota manager statistics from /proc  
• ypbind - NIS binding process  
• yppoll - return version and master server of a NIS map  
• ypset - bind ypbind to a particular NIS server  
• yptest - test NIS configuration  
• yum-arch - arch - Creates yum distribution database  
• yum-shell - Yellowdog Updater Modified shell  
• yum - Yellowdog Updater Modified  
• zdump - time zone dumper  
• zic - time zone compiler