On Fedora clean the boot directory; erase older kernel

A quick way to list services running

This command will replace all instances of 'foo' with 'bar' in all files in the current working directory and any sub-directories.

This command will replace all instances of 'foo' with 'bar' in all files in the current working directory.

Allows you to save progress without committing.

To revert to an undo point, svn revert then apply the undo point with patch.

Similar: http://www.commandlinefu.com/commands/view/373/archive-all-files-containing-local-changes-svn

faster than lsof by at least x2 on my box.

It extracts X number of lines from file1 and dumps them to file2.Using grep with the empty string '' extracts the complete lines (i.e. no filtering takes place) and the -m flag indicates how many lines to extract out from the given file. Then using the redirect > operator we send the extracted lines to a new file.

This command will grep the entire directory looking for any files containing the list of files. This is useful for cleaning out your project of old static files that are no longer in use. Also ignores .svn directories for accurate counts. Replace 'static/images/' with the directory containing the files you want to search for.

You need curl.. and a Mac of course.

This command shows if there are any locked AFS volumes.

The output is a list of AFS volume IDs (or nothing if there are none locked).

Find out which RPMs were installed on a particular date.

These would (naturally) include update RPMs.

This example shows searching for "Thu 05 Mar" (with grep).

Alternatively, pipe it to less so you can search inside less (with less's neat text highlighting of the search term):

rpm -qa --queryformat '%{installtime} \"%{vendor}\" %{name}-%{version}-%{release} %{installtime:date}\n' | less # (this example) search term: Thu 05 Mar

This command converts filenames with embedded spaces in the current directory replacing spaces with the underscore ("_") character.

This command will kill all processes using a directory. It's quick and dirty. One may also use a -9 with kill in case regular kill doesn't work. This is useful if one needs to umount a directory.

This adds all new files to SVN recursively. It doesn't work for files that have spaces in their name, but why would you create a file with a space in its name in the first place?

populate the auth.hosts file with a list of IP addresses that are authorized to be in use and when you run this command it will return the addresses that are pingable and not in the authorized list.

Can be combined with the "Command line Twitter" command to tweet unauthorized access.