accept(2) accept: accept a connection on a socket. access(2) access: determine accessibility of file. acct(2) acct: turn accounting on or off. adjtime(2) adjtime: correct the time to allow synchronization of the system clock. bind(2) bind: bind a name to a socket. brk(2) brk, sbrk: change data segment size. chdir(2) chdir: change current working directory. chmod(2) chmod: change mode of file. chown(2) chown: change owner and group of a file. chroot(2) chroot: change root directory. close(2) close: delete a descriptor. connect(2) connect: initiate a connection on a socket. creat(2) creat: create a new file. dup(2) dup, dup2: duplicate a descriptor. execve(2) execve: execute a file. exit(2) _exit: terminate a process. fcntl(2) fcntl: file control. flock(2) flock: apply or remove an advisory lock on an open file. fork(2) fork: create a new process. fsync(2) fsync: synchronize a file's in-core state with that on disk. getdtablesize(2) getdtablesize: get descriptor table size. getgid(2) getgid, getegid: get group identity. getgroups(2) getgroups: get group access list. gethostid(2) gethostid, sethostid: get/set unique identifier of current host. gethostname(2) gethostname, sethostname: get/set name of current host. getitimer(2) getitimer, setitimer: get/set value of interval timer. getpagesize(2) getpagesize: get system page size. getpeername(2) getpeername: get name of connected peer. getpgrp(2) getpgrp: get process group. getpid(2) getpid, getppid: get process identification. getpriority(2) getpriority, setpriority: get/set program scheduling priority. getrlimit(2) getrlimit, setrlimit: control maximum system resource consumption. getrusage(2) getrusage: get information about resource utilization. getsockname(2) getsockname: get socket name. getsockopt(2) getsockopt, setsockopt: get and set options on sockets. gettimeofday(2) gettimeofday, settimeofday: get/set date and time. getuid(2) getuid, geteuid: get user identity. intro(2) intro: introduction to system calls and error numbers. ioctl(2) ioctl: control device. kill(2) kill: send signal to a process. killpg(2) killpg: send signal to a process group. link(2) link: make a hard link to a file. listen(2) listen: listen for connections on a socket. lseek(2) lseek: move read/write pointer. mkdir(2) mkdir: make a directory file. mknod(2) mknod: make a special file. mount(2) mount, umount: mount or remove file system. open(2) open: open a file for reading or writing, or create a new file. pipe(2) pipe: create an interprocess communication channel. profil(2) profil: execution time profile. ptrace(2) ptrace: process trace. quota(2) quota: manipulate disk quotas. read(2) read, readv: read input. readlink(2) readlink: read value of a symbolic link. reboot(2) reboot: reboot system or halt processor. recv(2) recv, recvfrom, recvmsg: receive a message from a socket. rename(2) rename: change the name of a file. rmdir(2) rmdir: remove a directory file. select(2) select: synchronous I/O multiplexing. send(2) send, sendto, sendmsg: send a message from a socket. setgroups(2) setgroups: set group access list. setpgrp(2) setpgrp: set process group. setquota(2) setquota: enable/disable quotas on a file system. setregid(2) setregid: set real and effective group ID. setreuid(2) setreuid: set real and effective user ID's. shutdown(2) shutdown: shut down part of a full-duplex connection. sigblock(2) sigblock: block signals. sigpause(2) sigpause: atomically release blocked signals and wait for interrupt. sigreturn(2) sigreturn: return from signal. sigsetmask(2) sigsetmask: set current signal mask. sigstack(2) sigstack: set and/or get signal stack context. sigvec(2) sigvec: software signal facilities. socket(2) socket: create an endpoint for communication. socketpair(2) socketpair: create a pair of connected sockets. stat(2) stat, lstat, fstat: get file status. swapon(2) swapon: add a swap device for interleaved paging/swapping. symlink(2) symlink: make symbolic link to a file. sync(2) sync: update super-block. syscall(2) syscall: indirect system call. truncate(2) truncate: truncate a file to a specified length. umask(2) umask: set file creation mode mask. unlink(2) unlink: remove directory entry. utimes(2) utimes: set file times. vfork(2) vfork: spawn new process in a virtual memory efficient way. vhangup(2) vhangup: virtually ``hangup'' the current control terminal. wait(2) wait, wait3: wait for process to terminate. write(2) write, writev: write output.