commandlinefu.com is the place to record those command-line gems that you return to again and again.
Delete that bloated snippets file you've been using and share your personal repository with the world. 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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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:
Use this like the cat command with the additional feature to strip out unprintable characters from the input, newlines will stay.
tr has some predefined sets of characters that are more convenient to use than characters codes
Tail is much faster than sed, awk because it doesn't check for regular expressions.
The above code is just an example of printing on the same line, hit Ctrl + C to stop
When using echo -ne "something\r", echo will:
- print "something"
- dont print a new line (-n)
- interpret \r as carriage return, going back to the start of the line (-e)
Remember to print some white spaces after the output if your command will print lines of different sizes, mainly if one line will be smaller than the previous
Edit from reading comments: You can achieve the same effect using printf (more standardized than echo): while true; do printf "%-80s\r" "$(date)"; sleep 1; done
64 elements max on 16 rows, 4 cols.
GNU Barcode will adapt automagically the width and the eight of your elements to fill the page.
Standard output format is PostScript.
man -t manpagename gives a postscript version of said man page. You then pipe it to ls, and assuming you have cups set up, it prints in your default printer.