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Commands by polaco

Commands by polaco from sorted by
Terminal - Commands by polaco - 6 results
zenity --list --width 500 --height 500 --column 'radio' --column 'url' --print-column 2 $(curl -s http://www.di.fm/ | awk -F '"' '/href="http:.*\.pls.*96k/ {print $2}' | sort | awk -F '/|\.' '{print $(NF-1) " " $0}') | xargs mplayer
2010-04-28 23:45:35
User: polaco
Functions: awk sort xargs
Tags: mplayer music radio zenity menu
15
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Choose from a nice graphical menu which DI.FM radio station to play

This is a very simple and lightweight way to play DI.FM stations

For a more complete version of the command with proper strings in the menu, try: (couldnt fit in the command field above)

zenity --list --width 500 --height 500 --title 'DI.FM' --text 'Pick a Radio' --column 'radio' --column 'url' --print-column 2 $(curl -s http://www.di.fm/ | awk -F '"' '/href="http:.*\.pls.*96k/ {print $2}' | sort | awk -F '/|\.' '{print $(NF-1) " " $0}') | xargs mplayer

This command line parses the html returned from http://di.fm and display all radio stations in a nice graphical menu. After the radio is chosen, the url is passed to mplayer so the music can start

dependencies:

- x11 with gtk environment

- zenity: simple app for displaying gtk menus (sudo apt-get install zenity on ubuntu)

- mplayer: simple audio player (sudo apt-get install mplayer on ubuntu)

Show sample output | Comments (2) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
paste file1 file2 fileN > merged
2010-03-12 16:34:48
User: polaco
Functions: paste
Tags: merge paste join
3
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Merge files, joining each line in one line

Merge files, joining line by line horizontally.

Very useful when you have a lot of files where each line represents an info about an event and you want to join them into a single file where each line has all the info about the same event

See the example for a better understanding

Show sample output | Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
while true; do echo -ne "$(date)\r"; sleep 1; done
2009-11-17 22:45:37
User: polaco
Functions: echo sleep
Tags: echo printing clear
11
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Carriage return for reprinting on the same line

The above code is just an example of printing on the same line, hit Ctrl + C to stop

When using echo -ne "something\r", echo will:

- print "something"

- dont print a new line (-n)

- interpret \r as carriage return, going back to the start of the line (-e)

Remember to print some white spaces after the output if your command will print lines of different sizes, mainly if one line will be smaller than the previous

Edit from reading comments: You can achieve the same effect using printf (more standardized than echo): while true; do printf "%-80s\r" "$(date)"; sleep 1; done

Comments (4) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
backup() { for i in "$@"; do cp -va $i $i.$(date +%Y%m%d-%H%M%S); done }
2009-11-10 20:59:45
User: polaco
Functions: cp date
Tags: backup copy date
4
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Create date based backups

This script creates date based backups of the files. It copies the files to the same place the original ones are but with an additional extension that is the timestamp of the copy on the following format: YearMonthDay-HourMinuteSecond

Show sample output | Comments (2) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
find <path> -name "*.tgz" -or -name "*.tar.gz" | while read file; do echo "$file: "; tar -tzf $file; done
2009-11-10 20:39:04
User: polaco
Functions: echo find read tar
Tags: find tar list
-2
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List files in tarballs

This script will list all the files in the tarballs present on any folder or subfolder of the provided path. The while loop is for echoing the file name of the tarball before listing the files, so the tarball can be identified

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ssh <host> 'tar -cz /<folder>/<subfolder>' | tar -xvz
2009-11-10 20:06:47
User: polaco
Functions: ssh tar
Tags: ssh copy tar compression
9
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Copy a folder tree through ssh using compression (no temporary files)

This command will copy a folder tree (keeping the parent folders) through ssh. It will:

- compress the data

- stream the compressed data through ssh

- decompress the data on the local folder

This command will take no additional space on the host machine (no need to create compressed tar files, transfer it and then delete it on the host).

There is some situations (like mirroring a remote machine) where you simply cant wait for a huge time taking scp command or cant compress the data to a tarball on the host because of file system space limitation, so this command can do the job quite well.

This command performs very well mainly when a lot of data is involved in the process. If you copying a low amount of data, use scp instead (easier to type)

Show sample output | Comments (4) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate