Commands by nordri (5)

  • Convert tab separate file (TSV) to JSON with jq

    With this command you can convert a tab separate file (TSV) into a JSON file with jq. For example, this input.tsv i-0b9adca882e5e6326 172.16.0.188 i-088dd69e5c3624888 172.16.0.102 i-0e70eac180537d4aa 172.16.0.85 will produce the showed output. Show Sample Output


    2
    cat input.tsv | jq --raw-input --slurp 'split("\n") | map(split("\t")) | .[0:-1] | map( { "id": .[0], "ip": .[1] } )'
    nordri · 2019-10-01 10:52:35 2
  • Day of the week of your birthday over the years.

    Do you ever want to know which day of week was your birhday! Now you can check that with this command, just set your birh date at the beginning (My bday in the example) and the dates will be revealed. ;) Show Sample Output


    3
    DAY=01; MONTH=07; YEAR=1979; CURRENT_YEAR=$(date +%Y); for i in $(seq $YEAR $CURRENT_YEAR); do echo -n "$i -> "; date --date "$i-$MONTH-$DAY" +%A; done
    nordri · 2018-06-08 07:56:59 2
  • Nice weather forecast on your shell

    Change Seville for your prefered city. Show Sample Output


    43
    curl wttr.in/seville
    nordri · 2016-08-28 09:43:38 9
  • Alias to connect every single node of cluster

    Terminal is part of XFCE Desktop. This will open a tab for every node that we pass in the command line. In a single line we'll connect to nodes of our server farm.


    -3
    alias connectAllMachines='Terminal --maximize -e "ssh server1" --tab -e "ssh server2" --tab -e "ssh server3"'
    nordri · 2010-12-27 08:47:08 0
  • download file1 file2 file3 file4 .... file 100

    With counter format [001, 002, ..., 999] , nice with pictures or wallpapers collections.


    -4
    for file in $(seq -f '%03.f' 1 $TOTAL ); do echo "($file/$TOTAL)"; curl -f -O http://domain.com/Name_$file.ext; done
    nordri · 2010-01-12 15:23:44 3

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Download all manuals RedHat 7 (CentOS/Fedora) with one command in Linux

Clear cassandra snapshots that are older than 30 days
Better than: $ nodetool clearsnapshot

start a VNC server for another user

Converts to PDF all the OpenOffice.org files in the directory
Requieres unoconv (debian package)

memcache affinity: queries local memcached for stats, calculates hit/get ratio and prints it out.
queries local memcached for stats, calculates hit/get ratio and prints it out.

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"

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