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Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.
Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):
Subscribe to the feed for:
Based on the execute with timeout command in this site.
A more complex script:
# This script will check the avaliability of a list of NFS mount point,
# forcing a remount of those that do not respond in 5 seconds.
# It basically does this:
# NFSPATH=/mountpoint TIMEOUT=5; perl -e "alarm $TIMEOUT; exec @ARGV" "test -d $NFSPATH" || (umount -fl $NFSPATH; mount $NFSPATH)
for i in $@; do
echo "Checking $i..."
if ! perl -e "alarm $TIMEOUT; exec @ARGV" "test -d $i" > /dev/null 2>&1; then
echo "$SCRIPT_NAME: $i is failing with retcode $?."1>&2
echo "$SCRIPT_NAME: Submmiting umount -fl $i" 1>&2
umount -fl $i;
echo "$SCRIPT_NAME: Submmiting mount $i" 1>&2
This helps quickly get information for each disk that is seemingly having hardware issues.
release upgrades are major upgrades as from 8.04 to 8.10 or from 8.10 to 9.04
update-manager-core must be installed:
sudo apt-get install update-manager-core
in some cases you must edit '/etc/update-manager/release-upgrades' and set 'Prompt=normal'
You WILL have problems if the files have the same name.
Use cases: consolidate music library and unify photos (especially if your camera separates images by dates).
After running the command and verifying if there was no name issues, you can use
ls -d */ | sed -e 's/^/\"/g' -e 's/$/\"/g' | xargs rm -r
to remove now empty subdirectories.
Us dc instead of bc. RPN FTW!!!
These should be a little faster since they don't have to spawn grep.
use this command to gzip the file and write to stdout and from the stdout redirect to the another file
The thunderbird message datastores get corrupt some times causing random failures, compaction to fail and general suck in thunderbird. Removing them causes thunderbird to rebuild the indexes and makes things quick again.
This command uses the top voted "Get your external IP" command from commandlinefu.com to get your external IP address.
Use this and you will always be using the communities favourite command.
This is a tongue-in-cheek entry and not recommended for actual usage.
Many users have a personal ~/bin folder for user scripts and other miscellaneous applications they can't or don't want to add to /usr/bin. But this folder can get large and unwieldy. The above command adds ~/bin and all its subdirectories to the PATH environment variable so the scripts can be organized without changing .bashrc.
a pkcs8 key will have integer 00 at offset 4 and an rsaEncryption object at offset 9
In Mac OS 9, the "New Folder" keyboard shortcut was Command+N, but in Mac OS X this was changed to "New Finder Window" instead, with "New Folder" taking the more awkward shortcut of Command+Shift+N. This command reverses their mappings.
Removes all lines between the lines containing "" and "", including these lines itself
Sometimes when working with XML files without an graphical editor, large comment-/annotation-blocks taper the readability to walk through the file. I like to create a copy of such documents without these annotations. As the documentation itself is in documentation tags inside the annotation tags an therefore graphical editors tend to put the annotation tags in their own lines, this command removes all documentations within annotation-tags.
Does one ping to a URL or host, and echo out just the response time. I use this on, with MRTG to monitor the connections to various hosts.