Commands by redowk (4)

  • Remove last x lines from file using sed

    Removes the last 5 lines from a file using sed


    0
    sed -n -e :a -i -e '1,5!{P;N;D;};N;ba' /etc/apt/sources.list
    redowk · 2017-03-06 18:22:48 20
  • Colorized tail using sed

    Tails make.out file and pipes it to sed which uses 3 colors: green: percentage (eg: 10%) yellow: warning (case insensitive) red: error (case insensitive)


    0
    tail -f ~/make.out | sed -e 's/\(...%\)/\o033[32m\1\o033[39m/' -e 's/\(.*[Ww][Aa][Rr][Nn][Ii][Nn][Gg].*\)/\o033[33m\1\o033[39m/' -e 's/\(.*[Ee][Rr][Rr][Oo][Rr].*\)/\o033[31m\1\o033[39m/'
    redowk · 2017-03-06 18:20:36 18
  • add time to make output and redirect it to a file

    Will prepend date and time in the following format: dd-mm-yyyy@hh:mm:ss (24hours format) and redirect it to make.out file Show Sample Output


    0
    make -j 2>&1 | while IFS= read -r line; do echo "$(date +"%d-%m-%Y@%T") $line"; done > make.out
    redowk · 2017-03-06 18:14:51 21
  • List movie size in current directory

    List imageSize for files with selected extensions in current directory Requires: exiftool (install from arch base repo: sudo pacman -S perl-image-exiftool) Show Sample Output


    0
    find . -regex '\(.*mp4\|.*mpg\|.*mpeg\|.*mov\|.*wmv\|.*mkv\|.*avi\)' -exec exiftool -directory -fileName -imageSize {} \;
    redowk · 2016-08-22 17:49:22 13

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Retrieve a random command from the commandlinefu.com API
Seeing that we get back plain text anyway we don't need lynx. Also the sed-part removes the credit line.

dont execute command just add it to history as a comment, handy if your command is not "complete" yet

How to run a command on a list of remote servers read from a file
The important thing to note in this command, is the "-n" flag.

Rename files in batch

Compress blank lines

Compute the average number of KB per file for each dir
Shorter version using --tag

Uncompress a CSS file
Ever compress a file for the web by replacing all newline characters with nothing so it makes one nice big blob? It is a great idea, however what about when you want to edit that file? ...Serious pain in the butt. I ran into this today in that my only copy of a CSS file was "compressed" with no newlines. I whipped this up and it converted back into nice human readable CSS :-) It could be nicer, but it does the job.

Create a favicon
Create a favicon suitable for use on your web site. Note: ppmtowinicon is part of libpbm, not ImageMagick.

git pull all repos

Finding the number of cpu's

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