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Run a command with a time limit true: Does nothing, but exits successfully tty: Prints terminal name uname: Prints system information unlink: Removes the specified file using the unlink function uptime: Tells how long the system has been running users: Prints the user names of users currently logged into the current host who
On modern Linuxes, information on shell built-in commands can be found by executing help, help [built-in name] or man builtins at a terminal prompt where bash is installed. Some commands, such as echo , false , kill , printf , test or true , depending on your system and on your locally installed version of bash, can refer to either a shell ...
cal is a command-line utility on a number of computer operating systems including Unix, Plan 9, Inferno and Unix-like operating systems such as Linux that prints an ASCII calendar of the given month or year. If the user does not specify any command-line options, cal will print a calendar of the current month.
A shell script can provide a convenient variation of a system command where special environment settings, command options, or post-processing apply automatically, but in a way that allows the new script to still act as a fully normal Unix command. One example would be to create a version of ls, the command to list files, giving it a shorter ...
In computing, touch is a command used to update the access date and/or modification date of a computer file or directory. It is included in Unix and Unix-like operating systems, TSC's FLEX, [1] Digital Research/Novell DR DOS, the AROS shell, [2] the Microware OS-9 shell, [3] and ReactOS. [4] The command is also available for FreeDOS [5] and ...
A basic statement is one that simply runs a command. The first word is taken as name of the command to be run and may be either an internal command, e.g., echo, or an external command. The rest of the words are passed as arguments to the command. At the basic statement level, here are some of the features of the grammar:
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The creator of Fish preferred to add new features as commands rather than syntax. This made features more discoverable, as the built-in features allow searching commands with options and help texts. Functions can also include human readable descriptions. A special help command gives access to all the fish documentation in the user's web browser ...