Commands using printf sorted by votes

Commands using printf (206)

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Get the rough (german) time from Twitter by @zurvollenstunde

Calc the rough time from Twitter. Now with leading Zeroes. Show Sample Output
This is sample output - yours may be different.
```
20:11
```
-2

printf "%02d:%02d\n" $(curl -s "http://search.twitter.com/search?from=zurvollenstunde&rpp=1" | grep -E '(Es ist jetzt|ago)' | sed 's/<[^>]*>//g;s/[^[:digit:]]//g' | xargs )

torrid · 2011-06-19 18:16:00 3
Get memory total from /proc/meminfo in Gigs

when you can do it , avoid pipe Show Sample Output
This is sample output - yours may be different.
```
1.72
```
-3

awk '{ printf "%.2f", $2/1024/1024 ; exit}' /proc/meminfo

benoit_c_lbn · 2011-11-12 15:38:56 4
kill some process (same as others) but parsing to a variable
This is sample output - yours may be different.
-4

tokill=`ps -fea|grep process|awk '{ printf $2" "}'`; kill -9 $tokill;

jhansen · 2009-07-11 01:40:29 7
Generate MD5 hash for a string
This is sample output - yours may be different.
-4

printf "$string" | md5sum

derekschrock · 2010-11-26 00:24:47 6
Check if Fail2Ban is Running

Check if Fail2Ban is running on the system and alert it with a message in the terminal Show Sample Output
This is sample output - yours may be different.
```
[INFO] Fail2Ban is not running

or:

[INFO] Fail2Ban is running and the PID is 3557
```
-6

FAIL2BAN=`ps ax | grep fail2ban | grep -v grep | awk {'print $1'}` && if [ -n "$FAIL2BAN" ]; then printf "\n[INFO] Fail2Ban is running and the PID is %s\n\n" $FAIL2BAN; else printf "\n [INFO] Fail2Ban is not running\n\n"; fi

fmdlc · 2009-02-11 04:36:49 8
Remove "ssh host" from known hosts file.

I have this as a file called deletekey in my ~/bin. Makes life a little easier.
This is sample output - yours may be different.
-13

echo "${1}" | egrep '^[[:digit:]]*$' ; if [ "$?" -eq 0 ] ; then sed -i "${1}"d $HOME/.ssh/known_hosts ; else printf "\tYou must enter a number!\n\n" ; exit 1 ; fi

DaveQB · 2010-07-11 23:09:11 3
‹ First < 7 8 9

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Swap a file or dir with quick resotre

This lets you replace a file or directory and quickly revert if something goes wrong. For example, the current version of a website's files are in public_html. Put a new version of the site in public_html~ and execute the command. The names are swapped. If anything goes wrong, execute it again (up arrow or !!).

Find files with the same names in several directories.

cat file1 file2 file3|sort|uniq -d finds the same lines in several files, especially in files with lists of files.

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Find files recursively that were updated in the last hour ignoring SVN files and folders.

Find files recursively that were updated in the last hour ignoring SVN files and folders. Incase you do a full svn up on accident.

Rename files in batch

execute your commands and avoid history records

$ secret_command;export HISTCONTROL= This will make "secret_command" not appear in "history" list.

Enable cd by variable names

Usage: $ mydir=/very/long/path/to/a/dir $ cd mydir I often need to cd where no man wants to go (i.e. long path). by enabling the shell option cdable_vars, I can tell cd to assume the destination is the name of a variable.

Remove all .svn folders

-depth argument will cause find to do a "depth first" tree search, this will eliminate the "No such file or directory" error messages

Watch YouTube and other Flash videos via mplayer (or whatever)

Many sites with Flash video players will download video files to /tmp on Linux, with temporary filenames like "FlashbGTHm4". These will often play in mplayer, totem, or other movie playing software. You must first navigate to a video page, let it start loading, and then pause playback.

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

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Commands using printf (206)

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