yadUK - Effective Information System Solutions » Linux CLI

/dev/null does not exist

admin — Wed, 25 Nov 2009 16:16:00 +0000

Lost your /dev/null by accidently shoving a file there as root? Use the following to recreate:

rm /dev/null; mknod -m 666 /dev/null c 1 3

admin — Mon, 06 Apr 2009 08:05:56 +0000

Using find on the command line as su is a great way to remove spent sessions from your /tmp directory for instance.

find -user theusersname -delete

Will remove all instances of that users files. A great quick way to clean up after a rogue application in development.

admin — Sat, 04 Apr 2009 08:00:30 +0000

These commands will replace all instances of ‘foo’ with ‘bar’ in all files in the current working directory and any sub-directories.

Current Directory:
sed -i s/foo/bar/g *

Recursively:
find * -type f -exec sed -i s/foo/bar/g {} \;