Commands by elofland

Commands by elofland (6)

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shush MOTD

I'm annoyed by the boilerplate "don't login unless you are supposed messages in our environment" - this shuts them up.
This is sample output - yours may be different.
6

touch ~/.hushlogin

elofland · 2012-12-05 18:03:41 7
intersection of two arrays

the comm utility (opposite of diff) show commonalities in files (in this case strings) Show Sample Output
This is sample output - yours may be different.
```
$ echo ${Array3[@]}
five four
```
0

Array1=( "one" "two" "three" "four" "five" );Array2=( "four" "five" "six" "seven" );savedIFS="${IFS}";IFS=$'\n';Array3=($(comm -12 <(echo "${Array1[*]}" |sort -u) <(echo "${Array2[*]}" | sort -u)));IFS=$savedIFS

elofland · 2010-08-23 19:25:22 4
ls not pattern

I've been looking for a way to do this for a while, get a not pattern for shell globs. This works, I'm using to grab logs from a remote server via scp. Show Sample Output
This is sample output - yours may be different.
```
$ ls
file1 file2.gz file3.gz
$ ls *[^.gz]
file1
```
1

ls *[^.gz]

elofland · 2010-07-29 20:25:48 10
diff output of two commands

This only works in bash
This is sample output - yours may be different.
4

diff <(tail -10 file1) <(tail -10 file2)

elofland · 2010-05-20 14:04:17 6
modify a file in place with perl

changes THIS to THAT in all files matching fileglob* without using secondary files
This is sample output - yours may be different.
2

perl -pi -e 's/THIS/THAT/g' fileglob*

elofland · 2009-02-05 19:19:52 61
add a little color to your prompt
This is sample output - yours may be different.
0

PS1="\[\033[44;1;37m\]\u\[\033[0m\]@\h\\$ "

elofland · 2009-02-05 17:29:18 26

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Create a mirror of a local folder, on a remote server

Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

fetch all revisions of a specific file in an SVN repository

Manages everything through one sed script instead of pipes of greps and awks. Quoting of shell variables is generally easier within a sed script.

Url Encode

Converts reserved characters in a URI to their percent encoded counterparts. Alternate python version: $ echo "$url" | python -c 'import sys,urllib;print urllib.quote(sys.stdin.read().strip())'

external projector for presentations

i spent way too many hours trying to fiddle with /etc/X11/xorg.conf trying to hook up various external projectors. too bad i didn't know this would solve all my problems.

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"

set a reminder for 5 days in the future

setup for reminder in 5 days, added the date in the future. To run a job at 4pm three days from now, you would do at 4pm + 3 days, to run a job at 10:00am on July 31, you would do at 10am Jul 31 and to run a job at 1am tomorrow, you would do at 1am tomorrow.

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

Rename files in batch

Edit a file inside a compressed archive without extracting it

If you vim a compressed file it will list all archive content, then you can pickup any of them for editing and saving. There you have the modified archive without any extra step. It supports many file types such as tar.gz, tgz, zip, etc.

cpu info

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