Commands tagged sed

sed already has an option for editing files in place and making backup copies of the old file. -i will edit a file in place and if you give it an argument, it will make a backup file using that string as an extension.

Slightly simpler version of previous sed command that does the same thing. In this case, the output will stop at the command, and the entire command will be terminated as well, instead of proceeding through the whole file.

If BREs can be used, this sed version will also get the job done.

Print out contents of file with line numbers.

This version will print a number for every line, and separates the numbering from the line with a tab.

Require "grep -P" ( pcre ).

If you don't have grep -P, use that :

Only need to install Image Magick package.

Display a xkcd comic with its title and save it in /tmp directory

If you prefer to view the newest xkcd, use this command:

This command find all files in the current dir and subdirs, and replace all occurances of "oldstring" in every file with "newstring".

My version uses printf and command substitution ($()) instead of echo -e and xargs, this is a few less chars, but not real substantive difference.

Also supports lowercase hex letters and a backslash (\) will make it through unescaped

as unixmonkey7109 pointed out, first awk parse replaces three steps.

It's not a big line, and it *may not* work for everybody, I guess it depends on the detail of access_log configuration in your httpd.conf. I use it as a prerotate command for logrotate in httpd section so it executes before access_log rotation, everyday at midnight.

For this example, all files in the current directory that end in '.xml.skippy' will have the '.skippy' removed from their names.

I modify 4077 and marssi commandline to simplify it and skip an error when parsing the first line of lsmod (4077). Also, it's more concise and small now. I skip using xargs ( not required here ). This is only for GNU sed.

For thoses without GNU sed, use that :

Liked command 4077 so I improved it, by doing all text manipulation with sed.

"Run this as root, it will be helpful to quickly get information about the loaded kernel modules." THX mohan43u

A function that takes a domain name as an argument

Strips comments from at least bash and php scripts. Normal # and // as well as php block comments

removes all of the:

empty/blank lines

lines beginning with #

lines beginning with //

lines beginning with /*

lines beginning with a space and then *

lines beginning with */

It also deletes the lines if there's whitespace before any of the above.

Add an alias to use in .bashrc like this:

The -i option in sed allows in-place editing of the input file.

Replace myexpression with any regular expression.

/expr/d syntax means if the expression matches then delete the line.

You can reverse the functionality to keep matching lines only by using:

That makes a function you can put in your ~/.bashrc to run it when you need in any term with an IP as argument

Alternative command to retrieve the CPU model name and strip off the "model name : " labels.

Not my script. Belongs to mathewbauer. Used without his permission.

This script gives a single line as shown in the sample output.

NOTE: I have blanked out the IP address for obvious security reasons. But you will get whatever is your IP if you run the script.

Tested working in bash.

Sometimes, you don't really care about all the other information that ifconfig spits at you (however useful it may otherwise be). You just want an IP. This strips out all the crap and gives you exactly what you want.

Yeah I know it's been up here a million times, but this service is a really clean and nice one. Nothing but your IP address on it. Actually I was to write something like this, and noticed this on appspot... ;)