Commands by zed (11)

  • Change the value of p to match the path where you wish to create the profile. To run it again in the future, use the parameter --user-data-dir (which gets echoed to you when run): chromium-browser --user-data-dir=/path/to/your/ Quick Functions: # create a new chromium profile new-chromium-profile() { p=~/.config/chromium/$1; cp -r ~/.config/chromium/Default $p && echo "chromium-browser --user-data-dir=$p" && chromium-browser --user-data-dir=$p; } # runs a chromium profile run-chromium-profile() { chromium-browser --user-data-dir=~/.config/chromium/$1; } Show Sample Output


    -1
    p=~/.config/chromium/zed; cp -r ~/.config/chromium/Default $p && echo "chromium-browser --user-data-dir=$p" && chromium-browser --user-data-dir=$p;
    zed · 2010-11-08 02:45:29 0
  • Create a progress dialog with custom title and text using zenity. Show Sample Output


    3
    for i in $(seq 0 5 100); do echo $i; sleep 1; done | zenity --progress --title "Installing Foobar" --text "Pleae wait until process has finished."
    zed · 2010-10-08 04:08:33 0
  • using seq inside a subshell instead of a bash sequence to create increments. Show Sample Output


    3
    for i in $(seq 0 5 100); do echo $i; sleep 1; done | dialog --gauge "Install..." 6 40
    zed · 2010-10-08 04:08:17 0
  • A more robust password creation utility # Create passwords in batch makepasswd --char=32 --count=10 # To learn more about the options you can use man makepasswd Show Sample Output


    -1
    makepasswd --char=32
    zed · 2010-09-29 06:01:32 0
  • Changes your desktop background image in gnome. Update the directory to wherever you keep your wallpapers. I like to create a sub-directory in my Wallpaper folder called "cycle" that I use to define the wallpapers I wish to loop in cron. ex: gconftool-2 -t str -s /desktop/gnome/background/picture_filename "$(find ~/Wallpapers/cycle -type f | shuf -n1)" Show Sample Output


    2
    gconftool-2 -t str -s /desktop/gnome/background/picture_filename "$(find ~/Wallpapers -type f | shuf -n1)"
    zed · 2010-09-21 04:01:55 0
  • Take a screenshot of the focused window with a 4 second countdown # shorten by adding to your .bashrc: alias sss='scrot -ucd4 && eog $(ls -tr | tail -n1)' echo -e "\nalias sss='scrot -ucd4 && eog $(ls -tr | tail -n1)'" >> ~/.bashrc -d 4 second delay -c display countdown -u focused window man scrot for more flags Show Sample Output


    6
    scrot -ucd4 -e 'eog $f'
    zed · 2010-09-15 03:31:06 4
  • requires "youtube-dl" -- sure you can do this with wget and some more obscurity but why waste your time when this great tool is available? the guts consist of mplayer converting a video to a gif -- study this command and read the man page for more information mplayer video.flv -ss 00:23 -endpos 6 -vo gif89a:fps=5:output=output.gif -vf scale=400:300 -nosound generates a 6 second gif starting at 23 seconds of play time at 5 fps and a scale of 400x300 start time (-ss)/end time (-endpos) formats: 00:00:00.000 end time should be relative to start time, not absolute. i.e. -endpos 5 == seconds after 0:42 = 0:47 end point play with fps and scale for lower gif sizes the subshell is a solution for the -b flag on youtube-dl which downloads the best quality video, sometimes, which can be various video formats $(ls ${url##*=}*| tail -n1) Show Sample Output


    12
    url=http://www.youtube.com/watch?v=V5bYDhZBFLA; youtube-dl -b $url; mplayer $(ls ${url##*=}*| tail -n1) -ss 00:57 -endpos 10 -vo gif89a:fps=5:output=output.gif -vf scale=400:300 -nosound
    zed · 2010-07-18 02:11:39 1
  • The above is an example of grabbing only the first column. You can define the start and end points specifically by chacater position using the following command: while read l; do echo ${l:10:40}; done < three-column-list.txt > column-c10-c40.txt Of course, it doesn't have to be a column, or extraction, it can be replacement while read l; do echo ${l/foo/bar}; done < list-with-foo.txt > list-with-bar.txt Read more about parameter expansion here: http://wiki.bash-hackers.org/syntax/pe Think of this as an alternative to awk or sed for file operations


    1
    while read l; do echo ${l%% *}; done < three-column-list.txt > only-first-column.txt
    zed · 2010-07-09 03:42:56 0
  • The above is just a prove of concept based around the nested bash substitution. This could be useful in situations where you're in a directory with many filetypes but you only want to convert a few. for f in *.bmp *.jpg *.tga; do convert $f ${f%.*}.png; done or you can use ls | egrep to get more specific... but be warned, files with spaces will cause a ruckus with expansion but the bash for loop uses a space delimited list. for f in $(ls | egrep "bmp$|jpg$|tga$"); do convert $f ${f%.*}.png; done I'm guessing some people will still prefer doing it the sed way but I thought the concept of this one was pretty neat. It will help me remember bash substitutions a little better :-P Show Sample Output


    8
    for f in t1.bmp t2.jpg t3.tga; do echo ${f%.*}.png; done
    zed · 2010-07-09 00:38:53 0
  • You need to have fortune and cowsay installed. It uses a subshell to list cow files in you cow directory (this folder is default for debian based systems, others might use another folder). you can add it to your .bashrc file to have it great you with something interesting every time you start a new session. Show Sample Output


    10
    fortune | cowsay -f $(ls /usr/share/cowsay/cows/ | shuf -n1)
    zed · 2010-07-08 02:57:52 2
  • This will be seen through your system's visual notification system, notify-osd, notification-daemon, etc. --- sleep accepts s,m,h,d and floats (date; sleep .25m; date) --- notify-send (-t is in milliseconds && -u low / normal / critical) man notify-send for more information --- notification-daemon can use b/i/u/a HTML


    5
    sleep 6s && notify-send -t 10000 -u critical "remember to think" &
    zed · 2010-07-01 02:17:24 4

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Selecting a random file/folder of a folder
Also looks in subfolders

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Lists all opened sockets (not only listeners), no DNS resolution (so it's fast), the process id and the user holding the socket. Previous samples were limiting to TCP too, this also lists UDP listeners.

Copy recursivelly files of specific filetypes
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Determine the version of a specific package with RPM
In this case, I'm getting the package version for 'redhat-release', but of course, this can be applied to any package installed on the filesystem. This is very handy in scripts that need to determine just the version of the package, without the package name and all the sed and grep hackery to get to the data you want. To find out all the support format strings that 'rpm --qf' supports: $ rpm --querytags

do a full file listing of every file found with locate

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

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"

count how many cat processes are running

list with full path

Inverted cowsay
It's quite fun to invert text using "flip.pl" (ref: http://ubuntuforums.org/showthread.php?t=2078323 ). Slightly more challenging is to flip a whole "cowsay". :-)


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