Linux man pages: Section 2

• _Exit - terminate the current process  
• _exit - terminate the current process  
• _llseek - reposition read/write file offset  
• _newselect - synchronous I/O multiplexing  
• _sysctl - read/write system parameters  
• accept - accept a connection on a socket  
• access - check user's permissions for a file  
• acct - switch process accounting on or off  
• adjtimex - tune kernel clock  
• afs_syscall - unimplemented system calls  
• alarm - set an alarm clock for delivery of a signal  
• alloc_hugepages - allocate or free huge pages  
• arch_prctl - set architecture specific thread state  
• bdflush - start, flush, or tune buffer-dirty-flush daemon  
• bind - bind a name to a socket  
• break - unimplemented system calls  
• brk - change data segment size  
• cacheflush - flush contents of instruction and/or data cache  
• capget - set/get process capabilities  
• capset - set/get process capabilities  
• chdir - change working directory  
• chmod - change permissions of a file  
• chown - change ownership of a file  
• chroot - change root directory  
• clock_getres - Get the resolution of any clock  
• clock_gettime - Return the current timespec value of tp for the specified clock  
• clock_nanosleep - Suspend execution of the currently running thread  
• clock_settime - Set the specified clock  
• clone - create a child process  
• close - close a file descriptor  
• connect - initiate a connection on a socket  
• creat - open and possibly create a file or device  
• delete_module - Delete a loadable module  
• dup - duplicate a file descriptor  
• dup2 - duplicate a file descriptor  
• epoll_create - open an epoll file descriptor  
• epoll_ctl - control interface for an epoll descriptor  
• epoll_wait - wait for an I/O event on an epoll file descriptor  
• execve - execute program  
• exit - terminate the current process  
• fadvise - Give advice about file access  
• fadvise64 - Give advice about file access  
• fadvise64_64 - Give advice about file access  
• fchdir - change working directory  
• fchmod - change permissions of a file  
• fchown - change ownership of a file  
• fcntl - manipulate file descriptor  
• fdatasync - synchronize a file's in-core data with that on disk  
• fgetxattr - retrieve an extended attribute value  
• flistxattr - list extended attribute names  
• flock - apply or remove an advisory lock on an open file  
• fork - create a child process  
• free_hugepages - allocate or free huge pages  
• fremovexattr - remove an extended attribute  
• fsetxattr - set an extended attribute value  
• fstat - get file status  
• fstatfs - get file system statistics  
• fstatvfs - get file system statistics  
• fsync - synchronize a file's complete in-core state with that on disk  
• ftruncate - truncate a file to a specified length  
• futex - Fast Userspace Locking system call  
• get_mempolicy - get the current process' or memory address' NUMA policy  
• get_thread_area - Get a Thread Local Storage (TLS) area  
• getcontext - get or set the user context  
• getcwd - get current working directory  
• getdents - get directory entries  
• getdomainname - get/set domain name  
• getdtablesize - get descriptor table size  
• getegid - get group identity  
• geteuid - get user identity  
• getgid - get group identity  
• getgroups - get/set list of supplementary group IDs  
• gethostid - get or set the unique identifier of the current host  
• gethostname - get/set host name  
• getitimer - get or set value of an interval timer  
• getpagesize - get memory page size  
• getpeername - get name of connected peer socket  
• getpgid - set/get process group  
• getpgrp - set/get process group  
• getpid - get process identification  
• getpmsg - unimplemented system calls  
• getppid - get process identification  
• getpriority - get/set program scheduling priority  
• getresgid - get real, effective and saved user or group ID  
• getresuid - get real, effective and saved user or group ID  
• getrlimit - get/set resource limits and usage  
• getrusage - get/set resource limits and usage  
• getsid - get session ID  
• getsockname - get socket name  
• getsockopt - get and set options on sockets  
• gettid - get thread identification  
• gettimeofday - get / set time  
• getuid - get user identity  
• getxattr - retrieve an extended attribute value  
• gtty - unimplemented system calls  
• idle - make process 0 idle  
• inb - port I/O  
• inb_p - port I/O  
• init_module - Initialize a loadable module entry  
• inl - port I/O  
• inl_p - port I/O  
• insb - port I/O  
• insl - port I/O  
• insw - port I/O  
• intro - Introduction to system calls  
• inw - port I/O  
• inw_p - port I/O  
• io_cancel - Cancel an outstanding asynchronous I/O operation  
• io_destroy - Destroy an asynchronous I/O context  
• io_getevents - Read asynchronous I/O events from the completion queue  
• io_setup - Create an asynchronous I/O context  
• io_submit - Submit asynchronous I/O blocks for processing  
• ioctl - control device  
• ioctl_list - list of ioctl calls in Linux/i386 kernel  
• ioperm - set port input/output permissions  
• iopl - change I/O privilege level  
• ipc - System V IPC system calls  
• kill - send signal to a process  
• killpg - send signal to a process group  
• lchown - change ownership of a file  
• lgetxattr - retrieve an extended attribute value  
• link - make a new name for a file  
• listen - listen for connections on a socket  
• listxattr - list extended attribute names  
• llistxattr - list extended attribute names  
• llseek - reposition read/write file offset  
• lock - unimplemented system calls  
• lookup_dcookie - return a directory entry's path  
• lremovexattr - remove an extended attribute  
• lseek - reposition read/write file offset  
• lsetxattr - set an extended attribute value  
• lstat - get file status  
• madvise - give advice about use of memory  
• mbind - Set memory policy for an memory range  
• mincore - get information on whether pages are in core  
• mkdir - create a directory  
• mknod - create a special or ordinary file  
• mlock - disable paging for some parts of memory  
• mlockall - disable paging for calling process  
• mmap - map or unmap files or devices into memory  
• mmap2 - map files or devices into memory  
• modify_ldt - get or set ldt  
• mount - mount and unmount filesystems  
• mprotect - control allowable accesses to a region of memory  
• mpx - unimplemented system calls  
• mremap - re-map a virtual memory address  
• msgctl - message control operations  
• msgget - get a message queue identifier  
• msgop - message operations  
• msgrcv - message operations  
• msgsnd - message operations  
• msync - synchronize a file with a memory map  
• munlock - reenable paging for some parts of memory  
• munlockall - reenable paging for calling process  
• munmap - map or unmap files or devices into memory  
• nanosleep - pause execution for a specified time  
• nfsservctl - syscall interface to kernel nfs daemon  
• nice - change process priority  
• obsolete - obsolete system calls  
• oldfstat - obsolete system calls  
• oldlstat - obsolete system calls  
• oldolduname - obsolete system calls  
• oldstat - obsolete system calls  
• olduname - obsolete system calls  
• open - open and possibly create a file or device  
• outb - port I/O  
• outb_p - port I/O  
• outl - port I/O  
• outl_p - port I/O  
• outsb - port I/O  
• outsl - port I/O  
• outsw - port I/O  
• outw - port I/O  
• outw_p - port I/O  
• pause - wait for signal  
• pciconfig_iobase - pci device information handling  
• pciconfig_read - pci device information handling  
• pciconfig_write - pci device information handling  
• personality - set the process execution domain  
• pipe - create pipe  
• pivot_root - change the root file system  
• poll - wait for some event on a file descriptor  
• posix_fadvise - predeclare an access pattern for file data  
• prctl - operations on a process  
• pread - read from or write to a file descriptor at a given offset  
• prof - unimplemented system calls  
• pselect - synchronous I/O multiplexing  
• ptrace - process trace  
• putpmsg - unimplemented system calls  
• pwrite - read from or write to a file descriptor at a given offset  
• quotactl - manipulate disk quotas  
• read - read from a file descriptor  
• readahead - Read in advance one or more pages of a file within a page cache  
• readdir - read directory entry  
• readlink - read value of a symbolic link  
• readv - read or write data into multiple buffers  
• reboot - reboot or enable/disable Ctrl-Alt-Del  
• recv - receive a message from a socket  
• recvfrom - receive a message from a socket  
• recvmsg - receive a message from a socket  
• remap_file_pages - create a non-linear file mapping  
• removexattr - remove an extended attribute  
• rename - change the name or location of a file  
• restart_syscall - Restart a system call  
• rmdir - delete a directory  
• rt_sigaction - Alter an action taken by a process  
• rt_sigpending - Examine a pending signal that has been raised while blocked  
• rt_sigprocmask - Change the list of currently blocked signals  
• rt_sigqueueinfo - Send signal information to a signal  
• rt_sigreturn - Return from a signal handler and clean up the stack frame  
• rt_sigsuspend - Replace the signal mask for a value with the unewset value until a signal is received  
• rt_sigtimedwait - Synchronously wait for queued signals specified in uthese  
• rtas - Allows userspace to call RTAS (Run Time Abstraction Services)  
• sbrk - change data segment size  
• sched_get_priority_max - get static priority range  
• sched_get_priority_min - get static priority range  
• sched_getaffinity - set and get a process's CPU affinity mask  
• sched_getparam - set and get scheduling parameters  
• sched_getscheduler - set and get scheduling algorithm/parameters  
• sched_rr_get_interval - get the SCHED_RR interval for the named process  
• sched_setaffinity - set and get a process's CPU affinity mask  
• sched_setparam - set and get scheduling parameters  
• sched_setscheduler - set and get scheduling algorithm/parameters  
• sched_yield - yield the processor  
• security - unimplemented system calls  
• select - synchronous I/O multiplexing  
• select_tut - synchronous I/O multiplexing  
• semctl - semaphore control operations  
• semget - get a semaphore set identifier  
• semop - semaphore operations  
• semtimedop - semaphore operations  
• send - send a message from a socket  
• sendfile - transfer data between file descriptors  
• sendmsg - send a message from a socket  
• sendto - send a message from a socket  
• set_mempolicy -
• set_thread_area - Set a Thread Local Storage (TLS) area  
• set_tid_address - Sets the current clear_child_tid to tidptr  
• setcontext - get or set the user context  
• setdomainname - get/set domain name  
• setegid - set effective user or group ID  
• seteuid - set effective user or group ID  
• setfsgid - set group identity used for file system checks  
• setfsuid - set user identity used for file system checks  
• setgid - set group identity  
• setgroups - get/set list of supplementary group IDs  
• sethostid - get or set the unique identifier of the current host  
• sethostname - get/set host name  
• setitimer - get or set value of an interval timer  
• setpgid - set/get process group  
• setpgrp - set/get process group  
• setpriority - get/set program scheduling priority  
• setregid - set real and/or effective user or group ID  
• setresgid - set real, effective and saved user or group ID  
• setresuid - set real, effective and saved user or group ID  
• setreuid - set real and/or effective user or group ID  
• setrlimit - get/set resource limits and usage  
• setsid - creates a session and sets the process group ID  
• setsockopt - get and set options on sockets  
• settimeofday - get / set time  
• setuid - set user identity  
• setup - setup devices and file systems, mount root file system  
• setxattr - set an extended attribute value  
• sgetmask - ANSI C signal handling  
• shmat - shared memory operations  
• shmctl - shared memory control  
• shmdt - shared memory operations  
• shmget - allocates a shared memory segment  
• shmop - shared memory operations  
• shutdown - shut down part of a full-duplex connection  
• sigaction - POSIX signal handling functions  
• sigaltstack - get or set alternate signal stack content  
• sigblock - manipulate the signal mask  
• siggetmask - manipulate the signal mask  
• sigmask - manipulate the signal mask  
• signal - ANSI C signal handling  
• sigpause - atomically release blocked signals and wait for interrupt  
• sigpending - POSIX signal handling functions  
• sigprocmask - POSIX signal handling functions  
• sigqueue - queue a signal and data to a process  
• sigreturn - return from signal handler and cleanup stack frame  
• sigsetmask - manipulate the signal mask  
• sigsuspend - POSIX signal handling functions  
• sigtimedwait - synchronously wait for queued signals  
• sigvec - BSD software signal facilities  
• sigwaitinfo - synchronously wait for queued signals  
• socket - create an endpoint for communication  
• socketcall - socket system calls  
• socketpair - create a pair of connected sockets  
• ssetmask - ANSI C signal handling  
• sstk - change stack size  
• stat - get file status  
• statfs - get file system statistics  
• statfs64 - Get file system statistics  
• statvfs - get file system statistics  
• stime - set time  
• stty - unimplemented system calls  
• swapcontext - Swap out old context with new context  
• swapoff - start/stop swapping to file/device  
• swapon - start/stop swapping to file/device  
• symlink - make a new name for a file  
• sync - commit buffer cache to disk  
• syscall - indirect system call  
• syscalls - list of all system calls  
• sysctl - read/write system parameters  
• sysfs - get file system type information  
• sysinfo - returns information on overall system statistics  
• syslog - read and/or clear kernel message ring buffer; set console_loglevel  
• tgkill - Send signal sig to one specific thread, tgid  
• time - get time in seconds  
• timer_create - Create a POSIX.1b interval timer clock  
• timer_delete - Delete a POSIX.1b interval timer  
• timer_getoverrun - Get the number of overruns of a POSIX.1b interval timer  
• timer_gettime - Get the time remaining on a POSIX.1b interval timer  
• timer_settime - Set the time on a POSIX.1b interval timer  
• times - get process times  
• tkill - send a signal to a single process  
• truncate - truncate a file to a specified length  
• tux - interact with the TUX kernel subsystem  
• umask - set file creation mask  
• umount - mount and unmount filesystems  
• umount2 - mount and unmount filesystems  
• uname - get name and information about current kernel  
• undocumented - undocumented system calls  
• unimplemented - unimplemented system calls  
• unlink - delete a name and possibly the file it refers to  
• uselib - select shared library  
• ustat - get file system statistics  
• utime - change access and/or modification times of an inode  
• utimes - change access and/or modification times of an inode  
• vfork - create a child process and block parent  
• vhangup - virtually hangup the current tty  
• vm86 - enter virtual 8086 mode  
• wait - wait for process termination  
• wait3 - wait for process termination, BSD style  
• wait4 - wait for process termination, BSD style  
• waitpid - wait for process termination  
• write - write to a file descriptor  
• writev - read or write data into multiple buffers