Commands by rexington

Commands by rexington (4)

sorted by

Remove string with several escaped characters from all files under given path

Removes the given string from all files under the given path - in this case the path given is "." This demonstrates the characters that must be escaped for the grep and sed commands to do their work correctly. Very handy for fixing hacked html files.
This is sample output - yours may be different.
-1

S='<iframe src=\"http:\/\/254.254.254.254\/bad\/index.php\" width=\"1\" height=\"1\" frameborder=\"0\"><\/iframe>' && R=''; find . -name "*.html" -exec grep -l "$S" {} \; | xargs sed -i -e "s/$S/$R/g"

rexington · 2010-04-12 21:45:16 4
Find given string in all files with given name or extension

This will search for "string" in all files under the given path "." and provide a listing of the files with their relative locations. Show Sample Output
This is sample output - yours may be different.
```
./filename1.html
./directory1/filename2.html
```
0

find . -name "*.html" -exec grep -l 'string' {} \;

rexington · 2010-04-12 20:47:25 6
Delete all files older than X in given path

This will find all files under the path "." which are older than 10 days, and delete them. If you wish to use the "rm" command instead, replace "-delete" with "-exec rm [options] {} \;"
This is sample output - yours may be different.
2

find . -mtime +10 -delete

rexington · 2010-04-12 15:05:17 8
Find files older than X, using find.

This will find all files in the path "." which are older than 10*24hrs (10 days). This will find any type of file.
This is sample output - yours may be different.
0

find . -mtime +10

rexington · 2010-04-12 14:50:08 4

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

Make vim open in tabs by default (save to .profile)

I always add this to my .profile rc so I can do things like: "vim *.c" and the files are opened in tabs.

Port Knocking!

Knock on ports to open a port to a service (ssh for example) and knock again to close the port. You have to install knockd. See example config file below. [options] logfile = /var/log/knockd.log [openSSH] sequence = 3000,4000,5000 seq_timeout = 5 command = /sbin/iptables -A INPUT -i eth0 -s %IP% -p tcp --dport 22 -j ACCEPT tcpflags = syn [closeSSH] sequence = 5000,4000,3000 seq_timeout = 5 command = /sbin/iptables -D INPUT -i eth0 -s %IP% -p tcp --dport 22 -j ACCEPT tcpflags = syn

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Installing debian on fedora (chrooted)

Step#2 Create a copy of the bootload and partition table!

Complex string encoding with sed

Pipe | avoid escaping occurences problems in using sed and make it easier to use

send tweets to twitter (and get user details)

great for outputting tweets from cron jobs and batch scripts

check open ports without netstat or lsof

list block devices

Shows all block devices in a tree with descruptions of what they are.

Extract the contents of an RPM package to your current directory without installing them.

This assumes you have the 'rpm', 'rpm2cpio' and 'cpio' packages installed. This will extract the contents of the RPM package to your current directory. This is useful for working with the files that the package provides without installing the package on your system. Might be useful to create a temporary directory to hold the packages before running the extraction: $ mkdir /tmp/new-package/; cd /tmp/new-package

Stay in the loop…

Follow the Tweets.

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.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

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:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)
» commands by rexington