Commands by pykler (19)

  • Get your external IP and Network Info

    Gets all kind of info, ifconfig.me rocks ... for just the ip addess you can use ifconfig.me or ifconfig.me/ip Show Sample Output


    9
    curl ifconfig.me/all
    pykler · 2012-05-16 18:22:28 8
  • Split tsv file by fifth column ... or any column

    Will split the std input lines into files grouped by the 5th column content.


    0
    awk -F'\t' '{print $0 >>$5.tsv}'
    pykler · 2012-05-16 18:18:16 3
  • Realtime lines per second in a log file

    Realtime lines per second in a log file using python ... identical to perl version, except python is much better :) Show Sample Output


    0
    tail -F /var/log/nginx/access.log | python -c 'exec("import sys,time\nl=0\ne=int(time.time())\nfor line in sys.stdin:\n\tt = int(time.time())\n\tl += 1\n\tif t > e:\n\t\te = t\n\t\tprint l\n\t\tl = 0")'
    pykler · 2012-05-15 21:56:46 4
  • locating packages held back, such as with "aptitude hold <package>"

    locating packages held back, such as with "aptitude hold "


    1
    aptitude search ~ahold
    pykler · 2012-04-29 15:02:32 4
  • Show what PID is listening on port 80 on Linux


    17
    fuser -v 80/tcp
    pykler · 2011-12-16 14:51:34 3
  • Rsync a directory excluding pesky .svn dirs


    4
    rsync -rv --exclude .svn src/dir/ dest/dir/
    pykler · 2011-11-15 21:42:22 8
  • check open ports (both ipv4 and ipv6)


    4
    lsof -Pn | grep LISTEN
    pykler · 2011-09-29 18:21:51 10
  • Start a quick rsync daemon for fast copying on internal secure network

    An example config file is placed in the sample output along with the command line call to use it. The rsync daemon here is setup on the destination, thus requiring the read only = false flag. Also it uses uid and gid of root, change as required. Show Sample Output


    -3
    rsync --daemon --port 9999 --no-detach -v --config .rsyncd.conf
    pykler · 2011-09-22 20:48:31 3
  • Broadcast your shell thru port 5000

    Doesn't work so well if you connect from windows. Linux only sends LF where windows wants CRLF. The alternative command works better with windows, however it uses script and a named pipe.


    4
    bash -i 2>&1 | tee /dev/stderr | nc -l 5000
    pykler · 2010-10-20 18:32:12 3
  • Display sqlite results one column per line

    Similar output to using MySQL with the \G at the end of a Query. Displays one column per line. Other modes include: -column Query results will be displayed in a table like form, using whitespace characters to separate the columns and align the output. -html Query results will be output as simple HTML tables. -line Query results will be displayed with one value per line, rows separated by a blank line. Designed to be easily parsed by scripts or other programs -list Query results will be displayed with the separator (|, by default) character between each field value. The default. From inside the command line this can be also changed using the mode command: .mode MODE ?TABLE? Set output mode where MODE is one of: csv Comma-separated values column Left-aligned columns. (See .width) html HTML code insert SQL insert statements for TABLE line One value per line list Values delimited by .separator string tabs Tab-separated values tcl TCL list elements Show Sample Output


    0
    sqlite3 -line database.db
    pykler · 2010-10-09 16:10:19 8
  • Make any command read line enabled (on *nix)

    Enable readline even if the command line application is not using it. Show Sample Output


    8
    rlwrap sqlite3 database.db
    pykler · 2010-10-09 15:56:08 7
  • Add an audio soundtrack to a series of images to create an flv

    Creates a 5 minute flv file, with the given sequence of images and audio with 0.5 fps. The images were created using the following command: for x in `seq 0 300`; do cp ../head.PNG head-`printf '%03d' $x`.png; done You can also inject metadata to seek easier using yamdi as follows: yamdi -i muxed.flv -o video.flv Show Sample Output


    4
    ffmpeg -t 300 -r '0.5' -i head-%03d.png -i ../TvQuran.com__144.mp3 -acodec copy muxed.flv
    pykler · 2010-10-07 16:29:08 3
  • Get your external IP address

    With a lolcat favicon if you access it from your browser Show Sample Output


    -2
    curl icanhazip.com
    pykler · 2010-06-14 18:47:11 3
  • Pretty Print a simple csv in the command line

    Will handle pretty much all types of CSV Files. The ^M character is typed on the command line using Ctrl-V Ctrl-M and can be replaced with any character that does not appear inside the CSV. Tips for simpler CSV files: * If newlines are not placed within a csv cell then you can replace `map(repr, r)` with r Show Sample Output


    1
    python -c 'import sys,csv; c = csv.reader(sys.stdin); [sys.stdout.write("^M".join(map(repr,r))+"\n") for r in c];' <tmp/test.csv | column -s '^M' -t
    pykler · 2010-02-01 14:57:25 7
  • Print unique ipaddresses as they come in from Apache Access Log File

    Prints the unique IP Addresses as they arrive from an Apache `access.log` file. The '-W interactive' tells awk to start writing to stdout immediately and not buffer the output. This command builds on the uniq lines without sorting command (http://www.commandlinefu.com/commands/view/4389/remove-duplicate-entries-in-a-file-without-sorting.)


    1
    tail -f /var/log/apache2/access.log | awk -W interactive '!x[$1]++ {print $1}'
    pykler · 2010-01-12 15:23:03 9
  • List your largest installed packages.

    Calculates the size on disk for each package installed on the filesystem (or removed but not purged). This is missing the | sort -rn which would put the biggest packges on top. That was purposely left out as the command is slightly on the slow side Also you may need to run this as root as some files can only be checked by du if you can read them ;) Show Sample Output


    5
    dpkg --get-selections | cut -f1 | while read pkg; do dpkg -L $pkg | xargs -I'{}' bash -c 'if [ ! -d "{}" ]; then echo "{}"; fi' | tr '\n' '\000' | du -c --files0-from - | tail -1 | sed "s/total/$pkg/"; done
    pykler · 2009-10-12 14:57:54 5
  • Matrix Style

    Same as the cool matrix style command ( http://www.commandlinefu.com/commands/view/3652/matrix-style ), except replacing the printed character with randomness. The command mentioned is much faster and thus more true to the matrix. However, mine can be optimized, but I wasted ... i mean spent enough time on it already Show Sample Output


    6
    check the sample output below, the command was too long :(
    pykler · 2009-09-29 19:30:10 135
  • Pretty Print a simple csv in the command line

    Splits the input based on commas and prints it in a nice column format. This would not work for CSV rows that have "," between quotes or with newline characters. Use only simple simple csv files. Show Sample Output


    18
    column -s, -t <tmp.csv
    pykler · 2009-09-24 20:57:32 11
  • send echo to socket network

    Using netcat, usuallly installed on debian/ubuntu. Also to test against a sample server the following two commands may help echo got milk? | netcat -l -p 25 python -c "import SocketServer; SocketServer.BaseRequestHandler.handle = lambda self: self.request.send('got milk?\n'); SocketServer.TCPServer(('0.0.0.0', 25), SocketServer.BaseRequestHandler).serve_forever()" Show Sample Output


    2
    echo foo | netcat 192.168.1.2 25
    pykler · 2009-09-13 01:33:02 4

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Run a command only when load average is below a certain threshold
Good for one off jobs that you want to run at a quiet time. The default threshold is a load average of 0.8 but this can be set using atrun.

Convert spaces in file names to underscores

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"

list folders containing less than 2 MB of data
This command will search all subfolders of the current directory and list the names of the folders which contain less than 2 MB of data. I use it to clean up my mp3 archive and to delete the found folders pipe the output to a textfile & run: $ while read -r line; do rm -Rv "$line"; done < textfile

Burn CD/DVD from an iso, eject disc when finished.
cdrecord -scanbus will tell you the (x,y,z) value of your cdr (for example, mine is 3,0,0)

Run a command for blocks of output of another command
The given example collects output of the tail command: Whenever a line is emitted, further lines are collected, until no more output comes for one second. This group of lines is then sent as notification to the user. You can test the example with $ logger "First group"; sleep 1; logger "Second"; logger "group"

batch convert Nikon RAW (nef) images to JPG
converts RAW files from a Nikon DSLR to jpg for easy viewing etc. requires ufraw package

a function to create a box of '=' characters around a given string.
First argument: string to put a box around. Second argument: character to use for box (default is '=') Same as command #4948, but shorter, and without the utility function.

Backup all mysql databases to individual files on a remote server
It grabs all the database names granted for the $MYSQLUSER and gzip them to a remote host via SSH.

use the previous commands params in the current command
Here the !!:1 will take the first parameter from the previous command. This can be used in conjunction with other history commands like ! and so on.

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