access(2) access: determine accessibility of file. acct(2) acct: turn accounting on or off. alarm(2) alarm: schedule signal after specified time. brk(2) brk, sbrk, break: change core allocation. chdir(2) chdir: change default directory. chmod(2) chmod: change mode of file. chown(2) chown: change owner and group of a file. close(2) close: close a file. creat(2) creat: create a new file. dup(2) dup, dup2: duplicate an open file descriptor. exec(2) execl, execv, execle, execve, execlp, execvp, exec, exece, environ: execute a file. exit(2) exit: terminate process. fork(2) fork: spawn new process. getpid(2) getpid: get process identification. getuid(2) getuid, getgid, geteuid, getegid: get user and group identity. indir(2) indir, syscall: indirect system call. intro(2) intro, errno: introduction to system calls and error numbers. ioctl(2) ioctl, stty, gtty: control device. kill(2) kill: send signal to a process. link(2) link: link to a file. lseek(2) lseek, tell: move read/write pointer. mknod(2) mknod: make a directory or a special file. mount(2) mount, umount: mount or remove file system. mpx(2) mpx: create and manipulate multiplexed files. nice(2) nice: set program priority. open(2) open: open for reading or writing. pause(2) pause: stop until signal. pipe(2) pipe: create an interprocess channel. profil(2) profil: execution time profile. ptrace(2) ptrace: process trace. read(2) read: read from file. setuid(2) setuid, setgid: set user and group ID. signal(2) signal: catch or ignore signals. stat(2) stat, fstat: get file status. stime(2) stime: set time. stty(2) stty, gtty: set and retrieve terminal modes. sync(2) sync: update super-block. time(2) time, ftime: get date and time. times(2) times: get process times. umask(2) umask: set file creation mode mask. unlink(2) unlink: remove directory entry. utime(2) utime: set file times. wait(2) wait: wait for process to terminate. write(2) write: write on a file.