Commands by Vosaxalo (3)

  • Screencast of your PC Display with webm output

    Since ffmpeg on Ubuntu is deprecated, now there is avconv. Please note that the screen area here is set with a predefined format "-s wxga" that is corresponding to "-s 1366x768") There is also the option to add a title in the metadata of the resulting video.


    0
    avconv -v warning -f alsa -ac 2 -i default -f x11grab -r 15 -s wxga -i :0.0 -acodec libvorbis -ab 320k -vcodec libvpx -qmax 2 -qmin 1 -threads auto -y -metadata title="Title here" ~/Video/AVCONV_REG.webm
    Vosaxalo · 2012-12-14 13:34:07 0
  • Screencast of your PC Display with mp4 output

    Since ffmpeg on Ubuntu is deprecated, now there is avconv. Please note that the screen area here is set with a predefined format "-s wxga" that is corresponding to "-s 1366x768") There is also the option to add a title in the metadata of the resulting video.


    2
    avconv -v warning -f alsa -i default -f x11grab -r 15 -s wxga -i :0.0 -vcodec libx264 -preset ultrafast -threads auto -y -metadata title="Title here" ~/Video/AVCONV_REG.mp4
    Vosaxalo · 2012-12-14 13:30:11 0
  • CPU architecture details

    This command list all CPU technical infos. Show Sample Output


    7
    lscpu
    Vosaxalo · 2010-09-18 08:51:12 1

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Find top 10 largest files in /var directory (subdirectories and hidden files included )
Same as above, but modified to show human readable output

Unixtime
displays time in seconds since January 1, 1970 UTC

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This is the fastest method to search the Debian package database. Requires the dlocate package. The dlocate db updates periodically, but you may force an update with # dlocate-update

search for files or directories, then show a sorted list of just the unique directories where the matches occur
Ever use 'locate' to find a common phrase in a filename or directory name? Often you'll get a huge list of matches, many of which are redundant, and typically the results are not sorted. This command will 'locate' your search phrase, then show you a sorted list of just the relevant directories, with no duplications. So, for example, maybe you have installed several versions of the java jre and you want to track down every directory where files matching "java" might exist. Well, a 'locate java' is likely to return a huge list with many repeated directories since many files in one directory could contain the phrase "java". This command will whittle down the results to a minimal list of unique directory names where your search phrase finds a match.

Remove security limitations from PDF documents using ghostscript (for Windows)
#4345 also works under windows

Run any GUI program remotely
$ ssh -X example.org xeyes The SSH server configuration requires: X11Forwarding yes # this is default in Debian And it's convenient too: Compression delayed

One command line web server on port 80 using nc (netcat)
Very simple web server listening on port 80 will serve index.html file or whatever file you like pointing your browser at http://your-IP-address/index.html for example. If your web server is down for maintenance and you'd like to inform your visitors about it, quickly and easily, you just have to put into the index.html file the right HTML code and you are done! Of course you need to be root to run the command using port 80.

Fastest segmented parallel sync of a remote directory over ssh
Mirror a remote directory using some tricks to maximize network speed. lftp:: coolest file transfer tool ever -u: username and password (pwd is merely a placeholder if you have ~/.ssh/id_rsa) -e: execute internal lftp commands set sftp:connect-program: use some specific command instead of plain ssh ssh:: -a -x -T: disable useless things -c arcfour: use the most efficient cipher specification -o Compression=no: disable compression to save CPU mirror: copy remote dir subtree to local dir -v: be verbose (cool progress bar and speed meter, one for each file in parallel) -c: continue interrupted file transfers if possible --loop: repeat mirror until no differences found --use-pget-n=3: transfer each file with 3 independent parallel TCP connections -P 2: transfer 2 files in parallel (totalling 6 TCP connections) sftp://remotehost:22: use sftp protocol on port 22 (you can give any other port if appropriate) You can play with values for --use-pget-n and/or -P to achieve maximum speed depending on the particular network. If the files are compressible removing "-o Compression=n" can be beneficial. Better create an alias for the command.

iso to USB with dd and show progress status
need package: pv apt-get install pv get the iso size in byte with ls -l install-cd.iso /dev/sdb is your USB Device (without partitionNr.)

Number of CPU's in a system
This appears to do the same. Utility is verified to be present on Ubuntu and OpenSuse out-of-the-box.

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