Commands by taliver (5)


  • 2
    leapyear() { [ $(date -d "Dec 31, $1" +%j) == 366 ] && echo leap || echo not leap; }
    taliver · 2010-03-30 20:13:56 1
  • 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.


    1
    command | sed '/regex/q'
    taliver · 2009-12-29 14:52:41 0
  • Uses the dumb terminal option in gnuplot to plot a graph of frequencies. In this case, we are looking at a frequency analysis of words in all of the .c files. Show Sample Output


    5
    cat *.c | { printf "se te du\nplot '-' t '' w dots\n"; tr '[[:upper:]]' '[[:lower:]]' | tr -s [[:punct:][:space:]] '\n' | sort | uniq -c | sort -nr | head -n 100 | awk '{print $1}END{print "e"}'; } | gnuplot
    taliver · 2009-11-20 14:53:26 1
  • This is a quick hack to make a gcc caller. Since it runs with gcc instead of tcc, it's a bit more trustworthy as far as the final answers of things go. Show Sample Output


    -3
    alias cstdin='echo "Ctrl-D when done." && gcc -Wall -o ~/.stdin.exe ~/.stdin.c && ~/.stdin.exe'
    taliver · 2009-11-19 16:38:51 1
  • This uses urandom to produce a random password. The random values are uuencoded to ensure only printable characters. This only works for a number of characters between 1 and 60. Show Sample Output


    -3
    mkpasswd() { head -c $(($1)) /dev/urandom | uuencode - | sed -n 's/.//;2s/\(.\{'$1'\}\).*/\1/p' ;}
    taliver · 2009-11-19 14:27:52 2

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Find usb device in realtime
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Create and play an instant keyword based playlist
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Encryption file in commad line
This will encrypt your single file and create a filename.gpg file. Option: * -c : Encrypt with symmetric cipher To decrypt [email protected]:~$ gpg -c sample.rb.gpg

check open ports without netstat or lsof

Search some text from all files inside a directory

Clear mistyped passwords from password prompt
Type ^u at password prompt to clear a mistyped password.

Use Linux coding style in C program
put "-linux" option into $HOME/.indent.pro to make it default

Convert all .flac from a folder subtree in 192Kb mp3
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Rename .JPG to .jpg recursively
This command is useful for renaming a clipart, pic gallery or your photo collection. It will only change the big caps to small ones (on the extension).

Drop all tables from a database, without deleting it


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