Rm
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(Difference between revisions)
(Speak a little bit more abour -P) |
(polishing) |
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| − | + | Short for '''remove'''. Seriously, be careful when using this. There is no undelete once you've unlinked a file (unless you've aliased [[rm]] to a [[mv]] script that moves files to a trash folder or something -- which is not recommended because you will eventually find yourself on a system that doesn't have that alias and make a mistake.) | |
==Common flags== | ==Common flags== | ||
| Line 12: | Line 12: | ||
==About the -P argument== | ==About the -P argument== | ||
| − | Use this argument with extreme care | + | Use this argument with extreme care! If you use '''rm -P''' to remove a file that has hard links, the file will be immediately overwritten and its contents will be lost, thus not accessible via the links. For example : |
| − | $ echo 'Hello World' > foo | + | |
| − | $ ln foo bar | + | $ '''echo 'Hello World' > foo''' |
| − | $ cat foo bar | + | $ '''ln -h foo bar''' |
| + | $ '''cat foo bar''' | ||
Hello World | Hello World | ||
Hello World | Hello World | ||
| − | $ rm -P foo | + | $ '''rm -P foo''' |
| − | $ cat bar | + | $ '''cat bar''' |
| − | $ Hey !! where is bar contents ?? | + | $ '''Hey !! where is bar contents ??''' |
Hey, command not found | Hey, command not found | ||
See also [[rmdir]] | See also [[rmdir]] | ||
[[Category:System Commands]] | [[Category:System Commands]] | ||
Revision as of 05:28, 12 July 2005
Short for remove. Seriously, be careful when using this. There is no undelete once you've unlinked a file (unless you've aliased rm to a mv script that moves files to a trash folder or something -- which is not recommended because you will eventually find yourself on a system that doesn't have that alias and make a mistake.)
Common flags
-r recursive -- same as -R -f force -- do it and damn the consequences -d directories -i confirm before delete -P overwrite files (with 0xFF's, 0x00's, and 0xFF's again) before deleting them -v be verbose
About the -P argument
Use this argument with extreme care! If you use rm -P to remove a file that has hard links, the file will be immediately overwritten and its contents will be lost, thus not accessible via the links. For example :
$ echo 'Hello World' > foo $ ln -h foo bar $ cat foo bar Hello World Hello World $ rm -P foo $ cat bar $ Hey !! where is bar contents ?? Hey, command not found
See also rmdir
