The Open Group Base Specifications Issue 7
IEEE Std 1003.1, 2013 Edition
Copyright © 2013 The IEEE and The Open Group, All Rights reserved.

[ A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Index ]

### U

- ulimit - set or report file size limit
- ulimit() - get and set process limits
- ulimit.h - ulimit commands
- umask - get or set the file mode creation mask
- umask() - set and get the file mode creation mask
- unalias - remove alias definitions
- uname - return system name
- uname() - get the name of the current system
- uncompress - expand compressed data
- unexpand - convert spaces to tabs
- unget - undo a previous get of an SCCS file (DEVELOPMENT)
- ungetc() - push byte back into input stream
- ungetwc() - push wide-character code back into the input stream
- uniq - report or filter out repeated lines in a file
- unistd.h - standard symbolic constants and types
- unlink - call the unlink function
- unlink(), unlinkat - remove a directory entry relative to directory file descriptor
- unlinkat(), unlink - remove a directory entry relative to directory file descriptor
- unlockpt() - unlock a pseudo-terminal master/slave pair
- unset - unset values and attributes of variables and functions
- unsetenv() - remove an environment variable
- uselocale() - use locale in current thread
- utime() - set file access and modification times
- utime.h - access and modification times structure
- utimensat(), futimens, utimes - set file access and modification times
- utimes(), futimens, utimensat - set file access and modification times
- utmpx.h - user accounting database definitions
- uucp - system-to-system copy
- uudecode - decode a binary file
- uuencode - encode a binary file
- uustat - uucp status enquiry and job control
- uux - remote command execution

Topics

- Unbind
- Unit Data
- Upshifting
- User Database
- User ID
- User Name
- User Trace Event
- Utility Argument Syntax
- Utility Conventions
- Utility Syntax Guidelines
- Utility
- Utility (General Concept)