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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.

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Erase to factory a pendrive, disk or memory card, and watch the progress

Convert Unix newlines to DOS newlines
The ctrl+v,ctrl+m portion represents key presses that you should do. If you do it successfully you should see a ^M character appear.

View non-printing characters with cat
Useful to detect number of tabs in an empty line, DOS newline (carriage return + newline). A tool that can help you understand why your parsing is not working.

Kick user

Install pip with Proxy
Installs pip packages defining a proxy

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

Replace duplicate files by hardlinks

Extract public key from private
This will extract the public key that is stored in the private key using openssl.

Fast file backup
This is a BASH feature. The above command will create a backup of "filename" called "filename.DATE", where DATE is the actual day in %Y%m%d (year, month and day numbers together) format.

Download entire website for offline viewing
?mirror : turn on options suitable for mirroring. -p : download all files that are necessary to properly display a given HTML page. ?convert-links : after the download, convert the links in document for local viewing. -P ./LOCAL-DIR : save all the files and directories to the specified directory.


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