Commands by mrehqe (5)

  • Convert wma to mp3@128k

    Convert all wma to mp3@128k with ffmpeg into directory.


    1
    for f in *.wma; do ffmpeg -i "$f" -ab 128k "${f%.wma}.mp3" -ab 128K; done
    mrehqe · 2011-11-25 17:48:26 8
  • batch crop images whit imagemagik

    Crop several images by imagemagik's convert command. substitute , ,, with pixel value and with a different existent directory.


    -2
    for k in *.png; do convert $k -crop <width>x<high>+<cropwidth>+<cropthigh> <newpath>/$k; done
    mrehqe · 2011-11-14 17:04:15 8
  • Create fortune's *.dat file from commandlinefu from saved preferite

    Create fortune's *.dat file from commandlinefu from saved preferite script by suhasgupta (http://www.commandlinefu.com/commands/view/3681/backup-all-your-commandlinefu.com-favourites-to-a-plaintext-file) - Italian tutorial here: http://mrehqe.blogspot.com/2011/11/come-ottenere-un-commandlinefu-della.html


    0
    sed ':a;N;$!ba;s/\n\n/\n%\n/g' input.txt >output
    mrehqe · 2011-11-06 11:55:33 4
  • build DTT channel list with w-scan

    Use w_scan to build italian DTT video channel list. To change country, substitute IT with 2 letter country code. Userful to be played in vlc by: vlc -f dvb-channels.conf Show Sample Output


    0
    w_scan -X -P -t 2 -E 0 -c IT > dvb-channels.conf
    mrehqe · 2011-11-04 11:17:31 8
  • converts video to ascii art (txt) by mplayer and aa|caca lib

    Great for telnet stream. Substitute aa with caca for colour. To see in terminal: cat video.txt Show Sample Output


    0
    mplayer -vo aa:eight:driver=curses video.avi >video.txt
    mrehqe · 2011-10-31 10:06:10 6

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Get AWS temporary credentials ready to export based on a MFA virtual appliance
You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

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"

Encrypt and password-protect execution of any bash script, Version 2
(Please see sample output for usage) Use any script name (the read command gets it) and it will be encrypted with the extension .crypt, i.e.: myscript --> myscript.crypt You can execute myscript.crypt only if you know the password. If you die, your script dies with you. If you modify the startup line, be careful with the offset calculation of the crypted block (the XX string). Not difficult to make script editable (an offset-dd piped to a gpg -d piped to a vim - piped to a gpg -c directed to script.new ), but not enough space to do it on a one liner. Sorry for the chmod on parentheses, I dont like "-" at the end. Thanks flatcap for the subshell abbreviation to /dev/null

Lists all listening ports together with the PID of the associated process
The PID will only be printed if you're holding a root equivalent ID.

Access to specific man page section
You can view the man pages from section five by passing the section number as an argument to the man command

How to secure delete a file
Instead, install apt-get install secure-delete and you can use: -- srm to delete file and directory on hard disk -- smem to delete file in RAM -- sfill to delete "free space" on hard disk -- sswap to delete all data from swap

vim insert current filename
insert filename Normal mode: "%p Insert mode: %

Erase a word
hit BACKSPACE more than once to delete more words

print file without duplicated lines using awk
This create an array 'a' with wole lines. only one occurrence of each line - Not Get lines ++ !

Save your open windows to a file so they can be opened after you restart
This will save your open windows to a file (~/.windows). To start those applications: $ cat ~/.windows | while read line; do $line &; done Should work on any EWMH/NetWM compatible X Window Manager. If you use DWM or another Window Manager not using EWMH or NetWM try this: $ xwininfo -root -children | grep '^ ' | grep -v children | grep -v '' | sed -n 's/^ *\(0x[0-9a-f]*\) .*/\1/p' | uniq | while read line; do xprop -id $line _NET_WM_PID | sed -n 's/.* = \([0-9]*\)$/\1/p'; done | uniq -u | grep -v '^$' | while read line; do ps -o cmd= $line; done > ~/.windows

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