Commands tagged encoding (12)

  • Create executable, automountable filesystem in a file, with password!

    This is just a proof of concept: A FILE WHICH CAN AUTOMOUNT ITSELF through a SIMPLY ENCODED script. It takes advantage of the OFFSET option of mount, and uses it as a password (see that 9191? just change it to something similar, around 9k). It works fine, mounts, gets modified, updated, and can be moved by just copying it. USAGE: SEE SAMPLE OUTPUT The file is composed of three parts: a) The legible script (about 242 bytes) b) A random text fill to reach the OFFSET size (equals PASSWORD minus 242) c) The actual filesystem Logically, (a)+(b) = PASSWORD, that means OFFSET, and mount uses that option. PLEASE NOTE: THIS IS NOT AN ENCRYPTED FILESYSTEM. To improve it, it can be mounted with a better encryption script and used with encfs or cryptfs. The idea was just to test the concept... with one line :) It applies the original idea of http://www.commandlinefu.com/commands/view/7382/command-for-john-cons for encrypting the file. The embedded bash script can be grown, of course, and the offset recalculation goes fine. I have my own version with bash --init-file to startup a bashrc with a well-defined environment, aliases, variables. Show Sample Output


    6
    dd if=/dev/zero of=T bs=1024 count=10240;mkfs.ext3 -q T;E=$(echo 'read O;mount -o loop,offset=$O F /mnt;'|base64|tr -d '\n');echo "E=\$(echo $E|base64 -d);eval \$E;exit;">F;cat <(dd if=/dev/zero bs=$(echo 9191-$(stat -c%s F)|bc) count=1) <(cat T;rm T)>>F
    rodolfoap · 2013-01-31 01:38:30 13
  • Convert encoding of given files from one encoding to another


    4
    iconv -f utf8 -t utf16 /path/to/file
    imsaar · 2009-12-01 21:02:58 3
  • Uniformly correct filenames in a directory

    Useful if non-ascii characters in filenames have been improperly encoded. Replace "PROBLEM" with the incorrect characters (e.g. 'é'), and "FIX" with the correct ones (e.g. '?').


    3
    for i in *;do mv "$i" "$(echo $i | sed s/PROBLEM/FIX/g)";done
    AlecSchueler · 2009-06-28 01:50:25 18
  • Get gzip compressed web page using wget.

    Get gzip compressed web page using wget. Caution: The command will fail in case website doesn't return gzip encoded content, though most of thw websites have gzip support now a days.


    3
    wget -q -O- --header\="Accept-Encoding: gzip" <url> | gunzip > out.html
    ashish_0x90 · 2010-11-27 22:14:42 6
  • Convert encoding from cp1252 (MS Windows) to UTF-8 on source code files


    3
    find . -iname *.java -type f -exec bash -c "iconv -f WINDOWS-1252 -t UTF-8 {} > {}.tmp " \; -exec mv {}.tmp {} \;
    miguelbaldi · 2012-01-12 20:00:26 5
  • Detect encoding of a text file

    This command gives you the charset of a text file, which would be handy if you have no idea of the encoding. Show Sample Output


    2
    file -i <textfile>
    juvenn · 2009-09-08 01:33:19 4
  • Encoding from AVI to MPEG format

    http://www.mplayerhq.hu/DOCS/HTML/en/menc-feat-mpeg.html MEncoder can create MPEG (MPEG-PS) format output files. Usually, when you are using MPEG-1 or MPEG-2 video, it is because you are encoding for a constrained format such as SVCD, VCD, or DVD. To change MEncoder's output file format, use the -of mpeg option. Creating an MPEG-1 file suitable to be played on systems with minimal multimedia support, such as default Windows installs: mencoder input.avi -of mpeg -mpegopts format=mpeg1:tsaf:muxrate=2000 \ -o output.mpg -oac lavc -lavcopts acodec=mp2:abitrate=224 -ovc lavc \ -lavcopts vcodec=mpeg1video:vbitrate=1152:keyint=15:mbd=2:aspect=4/3


    1
    mencoder input.avi -of mpeg -ovc lavc -lavcopts vcodec=mpeg1video \ -oac copy other_options -o output.mpg
    slishan · 2010-01-18 13:12:03 3
  • Encode file path to URL

    Really helpfull when play with files having spaces an other bad name. Easy to store and access names and path in just a field while saving it in a file. This format (URL) is directly supported by nautilus and firefox (and other browsers) Show Sample Output


    1
    convert_path2uri () { echo -n 'file://'; echo -n "$1" | perl -pe 's/([^a-zA-Z0-9_\/.])/sprintf("%%%.2x", ord($1))/eg' ;} #convert2uri '/tmp/a b' ### convert file path to URI
    totti · 2013-07-01 08:54:45 7
  • Get gzip compressed web page using wget.

    Like the original command, but the -f allows this one to succeed even if the website returns uncompressed data. From gzip(1) on the -f flag: If the input data is not in a format recognized by gzip, and if the --stdout is also given, copy the input data without change to the standard output: let zcat behave as cat.


    1
    wget -q -O- --header="Accept-Encoding: gzip" <url> | gzip -cdf > out.html
    tempusername · 2014-11-29 20:42:21 8
  • Detect encoding of a text file


    0
    uchardet <filename>
    fltman · 2014-11-28 07:47:13 7
  • function to fix files starting with =?UTF-8 and ends with ?=

    I still don't know why mutt (or offlineimap or whatever in between), is borking the encoding of my files, but this fixes it. Show Sample Output


    0
    fix_saved_files() { for i in "$@" ; do mv $i $(php -r '$or = "'$i'"; mb_internal_encoding("UTF-8"); echo mb_decode_mimeheader($or) . "\n";') ; done; }
    guillaume · 2014-12-27 20:37:16 8
  • Encoding with base64

    Also works with files: cat file Hello world base64 file SGVsbG8gd29ybGQK To decrypt use the -d option: echo SGVsbG8gd29ybGQK | base64 -d Hello world Show Sample Output


    -3
    echo "Hello world" | base64
    P17 · 2009-04-27 15:00:08 16

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Kills a process that is locking a file.
Useful when you're trying to unmount a volume and other sticky situations where a rogue process is annoying the hell out of you.

Convert seconds to [DD:][HH:]MM:SS
Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Automagically update grub.conf labels after installing a new kernel
I like to label my grub boot options with the correct kernel version/build. After building and installing a new kernel with "make install" I had to edit my grub.conf by hand. To avoid this, I've decided to write this little command line to: 1. read the version/build part of the filename to which the kernel symlinks point 2. replace the first label lines of grub.conf grub.conf label lines must be in this format: Latest [{name}-{version/build}] Old [{name}-{version/build}] only the {version/build} part is substituted. For instance: title Latest [GNU/Linux-2.6.31-gentoo-r10.201003] would turn to title Latest [GNU/Linux-2.6.32-gentoo-r7.201004]"

Rename files in batch

list block devices
Shows all block devices in a tree with descruptions of what they are.

complete extraction of a debian-package
extracts the debian-package $debfile to $extractdir, including all packaging-information. to repack the package, just type: $dpkg-deb -b $extractdir

Install your ssh key file on a remote system

Terminal redirection
Will redirect output of current session to another terminal, e.g. /dev/pts/3 Courtesy of bassu, http://www.commandlinefu.com/commands/by/bassu

Changes a User Password via command line without promt
Used to change a password via a winscp faux shell

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

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