Commands by RedFox

Commands by RedFox (12)

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Create backup copy of file and keep modified date and time

Use shell expansion to create a back-up copy (file.txt.bak) of a file (file.txt) and keep the original last modified date and time.
This is sample output - yours may be different.
0

cp -p file.txt{,.bak}

RedFox · 2014-09-12 13:49:26 10
Arguments too long
This is sample output - yours may be different.
1

find . -name "*.txt" -exec WHATEVER_COMMAND {} \;

RedFox · 2014-03-12 11:49:41 7
Find and replace text within all files within a directory

find . = will set up your recursive search. You can narrow your search to certain file by adding -name "*.ext" or limit buy using the same but add prune like -name "*.ext" -prune xargs =sets it up like a command line for each file find finds and will invoke the next command which is perl. perl = invoke perl -p sets up a while loop -i in place and the .bak will create a backup file like filename.ext.bak -e execute the following.... 's/ / /;' your basic substitute and replace.
This is sample output - yours may be different.
0

find . | xargs perl -p -i.bak -e 's/oldString/newString/;'

RedFox · 2012-11-28 17:11:18 5
Sum of directories
This is sample output - yours may be different.
0

du -sh *

RedFox · 2012-11-28 17:07:55 5
Total sum of directories
This is sample output - yours may be different.
0

du -sh

RedFox · 2012-11-28 17:07:08 6
Check Zone File
This is sample output - yours may be different.
0

named-checkzone {zonename} {filename}

RedFox · 2012-11-28 17:06:28 5
Matching Strings
This is sample output - yours may be different.
0

grep -l <string-to-match> * | xargs grep -c <string-not-to-match> | grep '\:0'

RedFox · 2012-11-28 17:03:46 9
Delete Empty Files
This is sample output - yours may be different.
0

find . -size 0c -print -exec rm -f {} \;

RedFox · 2012-11-28 17:03:07 6
ls -altr | grep ^d
This is sample output - yours may be different.
0

ls -altr | grep ^d

RedFox · 2012-11-28 17:02:11 5
find . $ -name \*.cgi -o -name \*.txt -o -name \*.htm -o -name \*.html -o -name \*.shtml $ -print | xargs grep -s pattern
This is sample output - yours may be different.
0

find . $ -name \*.cgi -o -name \*.txt -o -name \*.htm -o -name \*.html -o -name \*.shtml $ -print | xargs grep -s pattern

RedFox · 2012-11-28 17:01:37 5
find . -type f -exec grep -ils stringtofind {} +
This is sample output - yours may be different.
0

find . -type f -exec grep -ils stringtofind {} +

RedFox · 2012-11-28 13:10:07 5
find . -name "*" -print | xargs grep -s pattern
This is sample output - yours may be different.
0

find . -name "*" -print | xargs grep -s pattern

RedFox · 2012-11-28 13:09:35 5

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write by vim need root privilege

Write comments to your history.

A null operation with the name 'comment', allowing comments to be written to HISTFILE. Prepending '#' to a command will *not* write the command to the history file, although it will be available for the current session, thus '#' is not useful for keeping track of comments past the current session.

Record camera's output to a avi file

video.avi is the resulting file. Press Ctrl+c to stop the recording. You can change the OVC option to another to record into a different format.

Add timestamp to history

History usually only gives the command number and the command. This will add a timestamp to the history file. Note: this will only put the correct timestamp on commands used after the export is done. You may want to put this in your .bashrc

vmstat/iostat with timestamp

Also useful with iostat, or pretty much anything else you want timestamped.

How to check network connection from one interface

This command only check the network connection from given eth. This is very useful if you are using more then one interface in your server or laptop.

Shows all packages installed that are recommended by other packages

Shows the packages installed on your system that are recomemnded by other packages. You should remove these packages.

Run a long job and notify me when it's finished

You will need libnotify-bin for this to work: $ sudo aptitude install libnotify-bin

Run a command that has been aliased without the alias

Most distributions alias cp to 'cp -i', which means when you attempt to copy into a directory that already contains the file, cp will prompt to overwrite. A great default to have, but when you mean to overwrite thousands of files, you don't want to sit there hitting [y] then [enter] thousands of times. Enter the backslash. It runs the command unaliased, so as in the example, cp will happily overwrite existing files much in the way mv works.

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