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The Wiki software enables editors to easily revert (undo) a single edit from the history of a page, without simultaneously undoing other changes that have been made since. To do this, view the page history or the diff for the edit, then click on "undo" next to the edit in question. The software will attempt to create an edit page with a version ...
The pushd ('push directory') command saves the current working directory to the stack then changes the working directory to the new path input by the user. If pushd is not provided with a path argument, in Unix it instead swaps the top two directories on the stack, which can be used to toggle between two directories.
Git does periodic repacking automatically, but manual repacking is also possible with the git gc command. [46] For data integrity, both the packfile and its index have an SHA-1 checksum [47] inside, and the file name of the packfile also contains an SHA-1 checksum. To check the integrity of a repository, run the git fsck command. [48] [49]
When you have decided to revert, please consider whether you will use the undo link in the page history, or revert manually. If you use the undo link, the editors whose edits you revert will receive a notification (if they have requested notification of reversions).
In Linux, if the script was executed by a regular user, the shell would attempt to execute the command rm -rf / as a regular user, and the command would fail. However, if the script was executed by the root user, then the command would likely succeed and the filesystem would be erased. It is recommended to use sudo on a per-command basis instead.
A shell script (or job) can report progress of long running tasks to the interactive user. Unix/Linux systems may offer other tools support using progress indicators from scripts or as standalone-commands, such as the program "pv". [49] These are not integrated features of the shells, however.
The lack of an interpreter directive, but support for shell scripts, is apparent in the documentation from Version 7 Unix in 1979, [28] which describes instead a facility of the Bourne shell where files with execute permission would be handled specially by the shell, which would (sometimes depending on initial characters in the script, such as ...
This pipe will be accessible with something like /dev/fd/63; you can see it with a command like echo <(true). Execute the substituted command in the background (sort file2 in this case), piping its output to the anonymous pipe. Execute the primary command, replacing the substituted command with the path of the anonymous pipe.