Commands by wilbercarmona

Commands by wilbercarmona (6)

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Create multiple files in a single command
This is sample output - yours may be different.
0

touch file{1,2,3,4,5}.sh

wilbercarmona · 2011-06-04 14:57:28 5
How many lines does the passwd file have?
This is sample output - yours may be different.
-1

cat /etc/passwd | wc -l

wilbercarmona · 2011-06-03 00:05:20 27
Find redirection and grep

You can find every file with png extension and redirect its output to file. Later you can find a string inside the file.
This is sample output - yours may be different.
-1

find . -name "*.png" | tee images.txt | grep book

wilbercarmona · 2011-06-02 23:55:50 6
Find and replace

You can replace "." with your folder
This is sample output - yours may be different.
-1

find . -name '*.txt' -exec mv {} {}.sh \ ;

wilbercarmona · 2011-06-02 23:47:19 4
Create a folder but first you can test if it exists
This is sample output - yours may be different.
0

test -d folder || mkdir folder

wilbercarmona · 2011-06-02 23:36:32 4
Watch netstat output every 2 seconds
This is sample output - yours may be different.
0

watch -n 2 netstat -antu

wilbercarmona · 2011-06-02 23:27:33 5

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Countdown Clock

The biggest advantage over atoponce's nifty original is not killing the scrollback. Written assuming bash, but shouldn't be terribly difficult to port to other shells. S should be multiple spaces, but I can't get commandlinefu to save/show them properly, any help?

Produce a pseudo random password with given length in base 64

Use Perl like grep

If you've ever tried "grep -P" you know how terrible it is. Even the man page describes it as "highly experimental". This function will let you 'grep' pipes and files using Perl syntax for regular expressions. The first argument is the pattern, e.g. '/foo/'. The second argument is a filename (optional).

Put public IP address in a variable

Target a specific column for pattern substitution

Awk replaces every instance of foo with bar in the 5th column only.

Delete all but the latest 5 files

yes 6 (tail from 6th line)

diff color words

Show this month's calendar, with today's date highlighted

Explanation: * The date command evaluated to today's date with blank padded on the left if single digit * The grep command search and highlight today's date * The --before-context and --after-context flags displays up to 6 lines before and after the line containing today's date; thus completes the calendar. I have tested this command on Mac OS X Leopard and Xubuntu 8.10

List your MACs address

list block devices

Shows all block devices in a tree with descruptions of what they are.

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