Commands by nordri (5)

  • 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 0
  • 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 1
  • Change Seville for your prefered city. Show Sample Output


    42
    curl wttr.in/seville
    nordri · 2016-08-28 09:43:38 9
  • 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
  • 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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Random unsigned integer

Setup an ssh tunnel
Uses ssh as tunnel tunnel for an other connection. -f runs ssh in the background -N tell that there is no command to run -L deals with the forwarding aspect where the first number is the local port number, the second is parameter is the name of the server to forward to and the third parameter is the port number on that server. The last part of the command is the usual ssh form consisting of the user name and remote server name

Kill all processes belonging to a single user.

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"

Install pip with Proxy
Installs pip packages defining a proxy

Remove security limitations from PDF documents using QPDF
Remove security restrictions from PDF documents using this very simple command on Linux and OSX. You need QPDF installed (http://qpdf.sourceforge.net/) for this to work.

Show all symlinks

Store dirs to later be changed to independant of the last directory you were in. Also with managment tools.
Check out: help dirs help pushd help popd -- Cheers!

Terminal Keyboard Shortcut list
This command will give you a list of available keyboard shortcuts according to stty.

a function to find the fastest DNS server
http://public-dns.info gives a list of online dns servers. you need to change the country in url (br in this url) with your country code. this command need some time to ping all IP in list.


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