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A chmod command first appeared in AT&T Unix version 1, along with the chmod system call. As systems grew in number and types of users, access-control lists [3] were added to many file systems in addition to these most basic modes to increase flexibility. The version of chmod bundled in GNU coreutils was written by David MacKenzie and Jim ...
This is a list of commands from the GNU Core Utilities for Unix environments. These commands can be found on Unix operating systems and most Unix-like operating systems. GNU Core Utilities include basic file, shell and text manipulation utilities. Coreutils includes all of the basic command-line tools that are expected in a POSIX system.
This is a list of POSIX (Portable Operating System Interface) commands as specified by IEEE Std 1003.1-2024, which is part of the Single UNIX Specification (SUS). These commands can be found on Unix operating systems and most Unix-like operating systems.
To clear it, use chmod -t /usr/local/tmp or chmod 0777 /usr/local/tmp (the latter will also reset the tmp directory to standard permissions). In Unix symbolic file system permission notation , the sticky bit is represented either by the letter t or T in the final character-place depending on whether the execution bit for the others category is ...
The classical behaviour of the sticky bit on executable files has been to encourage the kernel to retain the resulting process image in memory beyond termination; however, such use of the sticky bit is now restricted to only a minority of unix-like operating systems (HP-UX and UnixWare). On a directory, the sticky permission prevents users from ...
Permissions may be changed later by users and programs using chmod. Each program (technically called a process) has its own mask and is able to change its settings using a function call. When the process is a shell, the mask is set with the umask command. When a shell or process launches a new process, the child process inherits the mask from ...
"Experienced Unix and Linux users tend to recommend that the user of this command check the man page (man chmod) on the system of interest." Change to something like Users of old versions of Unix should check the man page.
The Unix and Linux access rights flags setuid and setgid (short for set user identity and set group identity) [1] allow users to run an executable with the file system permissions of the executable's owner or group respectively and to change behaviour in directories. They are often used to allow users on a computer system to run programs with ...