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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:
Using 7z to create archives is OK, but when you use tar, you preserve all file-specific information such as ownership, perms, etc. If that's important to you, this is a better way to do it.
Handy when you need to create a list of files to be updated when subversion is not available on the remote host. You can take this tar file, and upload and extract it where you need it. Replace M and N with the revisions specific to yours. Make sure you do this from an updated (svn up) working directory.
Remove annoying improperly packaged files that untar into the incorrect directory.
Example, When you untar and it extracts hundreds of files into the current directory.... bleh.
You can flexibly change file pattern(*.tar.gz) and uncompress command to other job!
Example, remove all files :
for i in *.tar.gz; do rm $i; done
(Just for example, because if you really want to remove file, simply use wildcard like this rm *.tar.gz)
Very simple and useful, you need to change the word "directory" for your directory
Leave it to a proprietary software vendor to turn a cheap and easy parlor trick into a selling point. "Hey guys, why don't we turn our _collection of multiple files_ into a *collection of multiple files*!!" Extract the ^above with this:
cat pics.tar.gz.??? | tar xzv
^extract on any Unix - no need to install junkware!
(If you must make proprietary software, at least make it do something *new*)
if [ -e windows ]; then use 7-Zip
create an archive of files with access time older than 5 days, and remove original files.
This will update the tarball, adding files that have changed since the last update.
This assumes that the tarball is in the same directory as the files being archived.
N.B. This command can't be used on compressed tarballs.
N.B. This will add the updated files to the tarball, so that the tarball will have two versions of each file. This will make the tarball larger, but doesn't have any other significant effect.
Where foodir is the directory you want to zip up.
PRIVATEKEY - Of course the full path to the private key \n
HOST - The host where to get the backup \n
SOURCE - The directory you wish to backup \n
DESTINATION - The destination for the backup on your local machine
gpg's compression is as suitable as gzip's however your backups can now be encrypted.
to extract use:
gpg < folder.tpg | tar -xf -
An easy one but nice to keep in mind.
Clone a partion with tar.
creates a tar.gz with a name like:
of a given directory.
this file was made 10 April 2009 at 5:30:53pm
see date's man page to customize the timestamp format
This command will copy files and directories from a remote machine to the local one.
Ensure you are in the local directory you want to populate with the remote files before running the command.
To copy a directory and it's contents, you could:
ssh user@host "(cd /path/to/a/directory ; tar cvf - ./targetdir)" | tar xvf -
This is especially useful on *nix'es that don't have 'scp' installed by default.