Commands by bouktin (3)

  • list the top 15 folders by decreasing size in MB Show Sample Output


    2
    du -xB M --max-depth=2 /var | sort -rn | head -n 15
    bouktin · 2013-05-23 10:45:21 7
  • remove all carriage return of a given file (or input, if used with | ) and replace them with a space (or whatever character is after %s) Show Sample Output


    -1
    awk ' { printf ("%s ", $0)} END {printf ("\n") } ' FILE
    bouktin · 2011-02-02 11:51:41 7
  • find the files locked by rcs utility Show Sample Output


    0
    find /path/to/folder/ -mindepth 1 -maxdepth 2 -name "*,v" -exec sudo rlog -L -R {} \;
    bouktin · 2011-01-13 16:07:42 5

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List installed deb packages by size

FAST Search and Replace for Strings in all Files in Directory
I needed a way to search all files in a web directory that contained a certain string, and replace that string with another string. In the example, I am searching for "askapache" and replacing that string with "htaccess". I wanted this to happen as a cron job, and it was important that this happened as fast as possible while at the same time not hogging the CPU since the machine is a server. So this script uses the nice command to run the sh shell with the command, which makes the whole thing run with priority 19, meaning it won't hog CPU processing. And the -P5 option to the xargs command means it will run 5 separate grep and sed processes simultaneously, so this is much much faster than running a single grep or sed. You may want to do -P0 which is unlimited if you aren't worried about too many processes or if you don't have to deal with process killers in the bg. Also, the -m1 command to grep means stop grepping this file for matches after the first match, which also saves time.

find files ignoring .svn and its decendents

save date and time for each command in history
Date-time format: YYYY-MM-DD HH:MM:SS

Print all git repos from a user (only curl and grep)

Generate a list of installed packages on Debian-based systems

Display unique values of a column
Find the unique values of a column utilizing awk. Credits goes to here (posted by "era"): http://www.unix.com/shell-programming-scripting/77138-awk-print-distinct-col-values.html

Know SELinux status
Usefule to check whether SELinux is in force or disabled. Though you need to be superuser while execute this command.

Send an email from the terminal when job finishes
Might as well include the status code it exited with so you know right away if it failed or not.

files and directories in the last 1 hour
added alias in ~/.bashrc alias lf='find ./* -ctime -1 | xargs ls -ltr --color'


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