Commands matching ls (1,289)

  • Proper screencast with audio using ffmpeg and x264, as per http://verb3k.wordpress.com/2010/01/26/how-to-do-proper-screencasts-on-linux/


    12
    ffmpeg -y -f alsa -ac 2 -i pulse -f x11grab -r 30 -s `xdpyinfo | grep 'dimensions:'|awk '{print $2}'` -i :0.0 -acodec pcm_s16le output.wav -an -vcodec libx264 -vpre lossless_ultrafast -threads 0 output.mp4
    NoahY · 2010-11-19 09:31:56 7
  • 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 36
  • no loop, only one call of grep, scrollable ("less is more", more or less...)


    12
    ls /usr/bin | xargs whatis | grep -v nothing | less
    michelsberg · 2010-01-26 12:59:47 32
  • This helped me find a botnet that had made into my system. Of course, this is not a foolproof or guarantied way to find all of them or even most of them. But it helped me find it.


    12
    cat /var/lib/dpkg/info/*.list > /tmp/listin ; ls /proc/*/exe |xargs -l readlink | grep -xvFf /tmp/listin; rm /tmp/listin
    kamathln · 2009-09-09 18:09:14 14

  • 11
    lsmac() { ifconfig -a | sed '/eth\|wl/!d;s/ Link.*HWaddr//' ; }
    vando · 2011-03-19 12:41:38 9
  • using cat WAR_AND_PEACE_By_LeoTolstoi.txt | tr -cs "[:alnum:]" "\n"| tr "[:lower:]" "[:upper:]" | sort -S16M | uniq -c |sort -nr | cat -n | head -n 30 ("sort -S1G" - Linux/GNU sort only) will also do the job but as some drawbacks (caused by space/time complexity of sorting) for bigger files... Show Sample Output


    11
    cat WAR_AND_PEACE_By_LeoTolstoi.txt | tr -cs "[:alnum:]" "\n"| tr "[:lower:]" "[:upper:]" | awk '{h[$1]++}END{for (i in h){print h[i]" "i}}'|sort -nr | cat -n | head -n 30
    cp · 2010-07-05 06:39:20 15
  • Barely worth posting because it is so simple, but I use it literally all the time. I was always frustrated by the limitations that a non-gui environment imposes on diff'ing files. This fixes some of those limitations by colourising the output (you'll have to install colordiff, but it is just a wrapper for diff itself), using side-by-side mode for clearer presentation, and of course, the -W parameter, using tput to automatically insert you terminal width. Note that the double quotes aren't necessary if typed into terminal as-is. I included them for safety sake,


    11
    colordiff -yW"`tput cols`" /path/to/file1 /path/to/file2
    dweomer21 · 2009-11-26 18:00:53 7
  • This command asks for the station name and then connects to somafm, Great for those who have linux home entertainment boxes and ssh enabled on them, just for the CLI fiends out there ( I know I'm one of them ;) Also, don't forget to add this as alias(ie alias somafm="read -p 'Which Station? "; mplayer --reallyquite -vo none -ao sdl


    11
    read -p "Which station? "; mplayer --reallyquiet -vo none -ao sdl http://somafm.com/startstream=${REPLY}.pls
    denzuko · 2009-05-04 00:26:19 23
  • This command looks for a single file named emails.txt which is located somewhere in my home directory and cd to that directory. This command is especially helpful when the file is burried deep in the directory structure. I tested it against the bash shells in Xubuntu 8.10 and Mac OS X Leopard 10.5.6


    11
    cd $(dirname $(find ~ -name emails.txt))
    haivu · 2009-05-01 21:26:58 14

  • 11
    lsof -P | grep ':3000'
    thisduck · 2009-03-23 18:41:24 11
  • Requieres unoconv (debian package)


    11
    for i in $(ls *.od{tp}); do unoconv -f pdf $i; done
    prayer · 2009-03-10 20:03:48 12
  • This Anti-TarBomb function makes it easy to unpack a .tar.gz without worrying about the possibility that it will "explode" in your current directory. I've usually always created a temporary folder in which I extracted the tarball first, but I got tired of having to reorganize the files afterwards. Just add this function to your .zshrc / .bashrc and use it like this; atb arch1.tar.gz and it will create a folder for the extracted files, if they aren't already in a single folder. This only works for .tar.gz, but it's very easy to edit the function to suit your needs, if you want to extract .tgz, .tar.bz2 or just .tar. More info about tarbombs at http://www.linfo.org/tarbomb.html Tested in zsh and bash. UPDATE: This function works for .tar.gz, .tar.bz2, .tgz, .tbz and .tar in zsh (not working in bash): atb() { l=$(tar tf $1); if [ $(echo "$l" | wc -l) -eq $(echo "$l" | grep $(echo "$l" | head -n1) | wc -l) ]; then tar xf $1; else mkdir ${1%.t(ar.gz||ar.bz2||gz||bz||ar)} && tar xf $1 -C ${1%.t(ar.gz||ar.bz2||gz||bz||ar)}; fi ;} UPDATE2: From the comments; bepaald came with a variant that works for .tar.gz, .tar.bz2, .tgz, .tbz and .tar in bash: atb() {shopt -s extglob ; l=$(tar tf $1); if [ $(echo "$l" | wc -l) -eq $(echo "$l" | grep $(echo "$l" | head -n1) | wc -l) ]; then tar xf $1; else mkdir ${1%.t@(ar.gz|ar.bz2|gz|bz|ar)} && tar xf $1 -C ${1%.t@(ar.gz|ar.bz2|gz|bz|ar)}; fi ; shopt -u extglob} Show Sample Output


    10
    atb() { l=$(tar tf $1); if [ $(echo "$l" | wc -l) -eq $(echo "$l" | grep $(echo "$l" | head -n1) | wc -l) ]; then tar xf $1; else mkdir ${1%.tar.gz} && tar xf $1 -C ${1%.tar.gz}; fi ;}
    elfreak · 2010-10-16 05:50:32 8
  • 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 8
  • Just refining last proposal for this check, showing awk power to make more complex math (instead /1024/1024, 2^20). We don't need declare variable before run lsof, because $(command) returns his output. Also, awk can perform filtering by regexp instead to call grep. I changed the 0.0000xxxx messy output, with a more readable form purging all fractional numbers and files less than 1 MB. Show Sample Output


    10
    lsof -p $(pidof firefox) | awk '/.mozilla/ { s = int($7/(2^20)); if(s>0) print (s)" MB -- "$9 | "sort -rn" }'
    tzk · 2010-01-13 22:45:53 7
  • Show time and date when you installed your OS. Show Sample Output


    10
    ls -lct /etc | tail -1 | awk '{print $6, $7}'
    MrMerry · 2009-09-03 10:26:37 13

  • 10
    ls | while read f; do mv "$f" "${f// /_}";done
    liam · 2009-08-27 16:43:56 8
  • This command will find the biggest files recursively under a certain directory, no matter if they are too many. If you try the regular commands ("find -type f -exec ls -laSr {} +" or "find -type f -print0 | xargs -0 ls -laSr") the sorting won't be correct because of command line arguments limit. This command won't use command line arguments to sort the files and will display the sorted list correctly. Show Sample Output


    10
    find . -type f -printf '%20s %p\n' | sort -n | cut -b22- | tr '\n' '\000' | xargs -0 ls -laSr
    fsilveira · 2009-08-13 13:13:33 14
  • If you want to operate on a set of items in Bash, and at least one of them contains spaces, the `for` loop isn't going to work the way you might expect. For example, if the current dir has two files, named "file" and "file 2", this would loop 3 times (once each for "file", "file", and "2"): for ITEM in `ls`; do echo "$ITEM"; done Instead, use a while loop with `read`: ls | while read ITEM; do echo "$ITEM"; done Show Sample Output


    10
    ls | while read ITEM; do echo "$ITEM"; done
    fletch · 2009-03-22 23:33:13 9
  • Use this command if you want to rename all subtitles for them to have the same name as the mp4 files. NOTE: The order of "ls -1 *.mp4" must match the order of "ls -1 *.srt", run the command bellow to make sure the *.srt files will really match the movies after run this command: paste -d:


    9
    paste -d: <(ls -1 *.mp4) <(ls -1 *.srt) | while read line; do movie="${line%%:*}"; subtitle="${line##*:}"; mv "${subtitle}" "${movie%.*}.srt"; done
    ricardofunke · 2020-11-08 02:47:13 459
  • hypnotizing pendulum


    9
    clear;while true;sleep 1;do for((a=1;a<=$(tput cols)/3;a++));do tput cup 0 $a;echo " " $(date);done;sleep 1;for((a;a>=1;a--));do tput cup 0 $a;echo $(date) " ";done;done
    knoppix5 · 2015-01-05 18:56:49 28
  • Convert JSON to YAML. Note that you'll need to have PyYaml installed.


    9
    python -c 'import sys, yaml, json; yaml.safe_dump(json.load(sys.stdin), sys.stdout, default_flow_style=False)' < file.json > file.yaml
    tebeka · 2013-04-24 00:31:39 92
  • List all commands present on system by folder. PATH contains all command folder separated by ':'. With ${PATH//:/ }, we change ':' in space and create a list of folder for ls command. Show Sample Output


    9
    ls ${PATH//:/ }
    Zulu · 2012-04-26 19:45:52 9
  • Use tput cols to find the width of the terminal and set it as the minimum field width. Show Sample Output


    9
    printf "%$(tput cols)s\n"|tr ' ' '='
    webstandardcss · 2012-04-21 23:26:55 4

  • 9
    xmlstarlet sel -t -c "/path/to/element" file.xml
    kev · 2011-12-19 06:20:46 4
  • This command will give you the same list of files as "find /etc/ -name '*killall' | xargs ls -l". In a simpler format just do 'ls /etc/**/file'. It uses shell globbing, so it will also work with other commands, like "cp /etc/**/sshd sshd_backup". Show Sample Output


    9
    ls -l /etc/**/*killall
    xeor · 2011-08-30 05:57:49 4
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Numerically sorted human readable disk usage
Provides numerically sorted human readable du output. I so wish there was just a du flag for this.

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"

Split huge file into DVD+R size chunks for burning
Real DVD+R size is 4700372992 bytes, but I round down a little to be safe. To reconstitute use cat. "cat file.img.gz.aa file.img.gz.ab ..... > file.img.gz"

Find the package that installed a command

Delete all but the latest 5 files, ignoring directories

cat stdout of multiple commands
Concatenate the stdout of multiple commands.

check open ports without netstat or lsof

Check command history, but avoid running it
!whatever will search your command history and execute the first command that matches 'whatever'. If you don't feel safe doing this put :p on the end to print without executing. Recommended when running as superuser.

Convert file type to unix utf-8
converts encoding of a file to unix utf-8 useful for data files that contain what would be usable ascii text but are encoded as mpeg or some other encoding that prevents you from doing common manipulations like 'sed'

check open ports without netstat or lsof


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