Commands by totti (87)

  • 1
    pmi action suspend
    totti · 2013-01-15 18:44:31 0
  • set how many commands to keep in history Default is 500 Saved in /home/$USER/.bash_history Add this to /home/$USER/.bashrc HISTFILESIZE=1000000000 HISTSIZE=1000000

    export HISTFILESIZE=99999
    totti · 2013-01-02 09:25:06 1
  • Use optimized sed to big file/stream to reduce execution time Use sed '/foo/ s/foo/foobar/g' <filename> insted of sed 's/foo/foobar/g' <filename>

    sed '/foo/ s/foo/foobar/g' <filename>
    totti · 2013-01-02 08:52:44 1
  • Accidentally deleted some file while used by a program ? (Eg: a song) Use this command to find the file handle and recover using cp /proc/pid/fd/filehandle /new/recoverd-file.ext Show Sample Output

    ls -l /proc/*/fd/* | grep 'deleted'| grep "\/proc.*\file-name-part"
    totti · 2012-09-13 09:54:16 0
  • EG: aspectRatio 1920 1200 For display a image in full screen it should be in any of the resolution obtained from the output. So resize an image to any of it and you can display it in full screen For general aspect ratio : aspectRatio () { for i in `seq 1 1000 `; do awk "BEGIN {print $1/$i, $2/$i}"; done |grep -v "\." |tail -1; } Show Sample Output

    aspectRatio () { for i in `seq 1 1000 `; do awk "BEGIN {print $1/$i, $2/$i}"; done |grep -v "\."; }
    totti · 2012-03-07 06:22:25 0
  • Redshift will adjust the color temperature and protects eye at night -b : will adjust the brightness

    redshiftgui -o -b 0.5
    totti · 2012-02-26 16:10:02 0

  • 0
    identify image.jpg |grep -o "[[:digit:]]*x[[:digit:]]*" |tail -1
    totti · 2012-02-19 06:49:38 1

  • -10
    grep -r <searchterm> *
    totti · 2012-02-08 11:48:08 4

  • 32
    showkey -a
    totti · 2012-01-26 10:47:19 4

  • 4
    xdotool getmouselocation
    totti · 2012-01-19 14:58:13 0
  • For a demo try wmctrl -o 100,0; sleep 3; wmctrl -o 1500,0; sleep 3; wmctrl -o 3000,0; sleep 3; wmctrl -o 4500,0; Actually wmctrl -o <width x Number>,0; to switch to that workspace

    wmctrl -o 100,0
    totti · 2012-01-19 14:36:20 4
  • In order to create a new encrypted filing system managed by cryptmount, you can use the supplied 'cryptmount-setup' program, which can be used by the superuser to interactively configure a basic setup. Alternatively, suppose that we wish to setup a new encrypted filing system, that will have a target-name of "opaque". If we have a free disk partition available, say /dev/hdb63, then we can use this directly to store the encrypted filing system. Alternatively, if we want to store the encrypted filing system within an ordinary file, we need to create space using a recipe such as: dd if=/dev/zero of=/home/opaque.fs bs=1M count=512 . cryptmount --generate-key 32 opaque . cryptmount --prepare opaque . mke2fs /dev/mapper/opaque . cryptmount --release opaque . mkdir /home/crypt . cryptmount -m opaque . cryptmount -u opaque For detail see sample output Show Sample Output

    cryptmount -m <name>
    totti · 2012-01-17 18:02:47 2
  • Used by virtualbox and others to create '.run' file.

    makeself <archive_dir> <file_name> <label>
    totti · 2012-01-10 18:08:50 2
  • Best result when file size less than half of RAM size

    cat <file> > /dev/null
    totti · 2011-11-12 15:45:27 3

  • 0
    stat --format "%s" <file>
    totti · 2011-11-12 15:41:09 1
  • Faster then other method using wget For obtain all commands use nu=`curl |grep -o "Terminal - All commands -.*results$" | grep -oE "[[:digit:],]{4,}" | sed 's/,//'`; curl[0-"$nu":25] | grep -vE "_curl_|\.com by David" > clf-ALL.txt For more version specific nu=`curl |grep -o "Terminal - All commands -.*results$" | grep -oE "[[:digit:],]{4,}" | sed 's/,//'`; curl[0-"$nu":25] | grep -vE "_curl_|\.com by David" > clf-ALL_"$nu".txt Also download dirctly from my dropbox My drop box invitaion link is . Use it and get free 2.5 GB space. Show Sample Output

    curl[0-9000:25] | grep -vE "_curl_|\.com by David" > clf-ALL.txt
    totti · 2011-11-08 12:19:48 0
  • thumbnail gallery of video using totem Show Sample Output

    totem-video-thumbnailer -pg 25 in_video out_png
    totti · 2011-10-31 18:07:36 5
  • Faster thumbnail creation than '-itsoffset' ffmpeg -itsoffset -4 -i test.avi -vcodec mjpeg -vframes 1 -an -f rawvideo -s 320x240 test.jpg Show Sample Output

    ffmpeg -ss 5 -i video.avi -vframes 1 -s 320x240 thumb.jpg
    totti · 2011-10-31 17:19:33 1
  • Handle any bad named file which contains ",',\n,\b,\t,` etc Store the file name as null character separated list find . -print0 >name.lst and retrieve it using read -r -d "" Eg: find . -print0 >name.lst; cat name.lst| while IFS="" read -r -d "" file; do ls -l "$file"; done Show Sample Output

    read -d ""
    totti · 2011-10-25 18:44:11 0

  • 4
    find . ! -name "$(printf '*[\001-\037\177]*')"
    totti · 2011-10-25 17:29:19 1
  • Add the followin to ~/.bashrc #colour export LESS_TERMCAP_mb=$'\E[01;31m' export LESS_TERMCAP_md=$'\E[01;37m' export LESS_TERMCAP_me=$'\E[0m' export LESS_TERMCAP_se=$'\E[0m' export LESS_TERMCAP_so=$'\E[01;44;33m' export LESS_TERMCAP_ue=$'\E[0m' export LESS_TERMCAP_us=$'\E[01;32m'

    echo "export LESS_TERMCAP_mb=$'\E[01;31m'" >> ~/.bashrc
    totti · 2011-10-20 17:34:14 1

  • 4
    filext () { echo ${1##*.}; }
    totti · 2011-10-20 16:35:25 0
  • Then exit from the shell. exit some time need to exit twice exit exit Now the OS will boot with the new parameters.

    echo "root=/dev/sda7" > /proc/param.conf
    totti · 2011-09-27 18:06:53 0
  • From live CD mount(open) the Ubuntu installed drive. Copy the location (press Ctrl+l, Ctrl+c ) eg: /media/ubuntuuuu Open terminal (Apllication->accessories->terminal) Type this: sudo grub-install --root-directory=/media/ubuntuuuu /dev/sda (replace /media/ubuntuuuu with what u got (ie paste)) Will show success message. Now reboot

    sudo grub-install --root-directory=/media/ubuntu /dev/sda
    totti · 2011-09-27 17:51:56 0
  • Consider the following simple situation [ reading something using while and read ] [See script 1 in sample output] --------------------------------------------------- The variable var is assigned with "nullll" at first. Inside the while loop [piped while] it is assigned with "whillleeee". [Onlly 2 assignments stmts]. Outside the loop the last assigned value for "var" [and no variable] inside the while can't be accessed [Due to pipe, var is executed in a sub shell]. In these type of situation variables can be accessed by modifying as follows. [See script 2 in sample output] ___________________________ Vary helpful when reading a set of items, say file names, stored on a file [or variable] to an array an use it later. Is there any other way 2 access variables inside and outside the loop ?? Show Sample Output

    while read line; do echo $line; done <<< "$var"
    totti · 2011-09-22 16:53:32 0
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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"

Remove a line from a file using sed (useful for updating known SSH server keys when they change)

Securely stream (and save) a file from a remote server
Securely stream a file from a remote server (and save it locally). Useful if you're impatient and want to watch a movie immediately and download it at the same time without using extra bandwidth. This is an extension of snipertyler's idea. Note: This command uses an encrypted connection, unlike the original.

recursive search and replace old with new string, inside files
xargs deals badly with special characters (such as space, ' and "). To see the problem try this: touch important_file touch 'not important_file' ls not* | xargs rm Parallel does not have this problem.

positions the mysql slave at a specific master position
say you want to reinitialize the slave database without resetting the master positions. You stop the slave, dump the master database with --master-data=2 then execute the command on the slave and wait for it to stop at the exact position of the dump. reinit the slave db and start the slave. enjoy.

create a colorful 田 image

Find out current working directory of a process

Copy specific files recursively using the same tree organization.
This command has been used to overwrite corrupted "entries" files of a corrupted subversion working copy. Note the --files-from input format.

Rsync between two servers
copying files from one server to another using rysnc. Root access need to be allowed on the destination.

Show LAN IP with ip(8)
$ ip address show | grep eth0 | sed '1d' | awk '{print $2}' does the same, but shows network-prefix.

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