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Use optimized sed to big file/stream to reduce execution time
sed '/foo/ s/foo/foobar/g' <filename>
insted of sed
search_criteria = what do you want to kill
pid = pid of you dont kill
Get the IP address of all your network cards.
Just copy and paste the code in your terminal.
Note : sudo apt-get for debian versions , change as per your requirement .
Source : www.h3manth.com
when editing .bash_profile (or .bashrc), run this to use the new version without having to exit and open a new terminal
-v invert-match : invert the sense of matching, to select non matching lines
rename is a great command, but can't get it to work on mac.
Parsing the output of ls is never a good idea for any reason. Using find this way:
- works with files that have spaces in their names.
- actually lists "sub folders" and not of all files and folders.
- does not break if there are a huge number of files in the current directory.
this lets you edit a crontab file (which may be used as a backup as well) and insert this into your crontab. this way is especially handy, when multiple users are working on one account (e.g. root)
if you cd into a directory then cd into another directory somewhere else then you run the cd - command you will go to the previous directory you was in!! To go back to the other directory just run it again. So if you are working in 2 different directories then this is the perfect command for you.
shorthand for sudo save
Found in comments section works on most Linux flavors.