Commands by nnsense (8)

  • Docker's local man pages are (often) half of what you have online, so I wanted that as local man. Install lynx and run my oneliner, then use as follows: dockpage Adjust lynx's page width at will Show Sample Output


    0
    dockpage() { lynx -width=180 --dump https://docs.docker.com/v1.11/engine/reference/commandline/$1/ | sed -n '/^Usage/,/On this page/{/On this page/b;p}'; }
    nnsense · 2017-09-18 23:53:34 12
  • Usefull, for example, when many ports are exposed and the docker ps output looks cluttered. Show Sample Output


    0
    alias dockps='docker ps --format "table {{.ID}}\t{{.Image}}\t{{.Status}}\t{{.Names}}"'
    nnsense · 2017-09-18 23:46:47 8
  • Sometimes it's useful to output just the ip address. Or some other information, changing the "ipv4.addresses" in command. The power of awk! Show all possible "greps" with nmcli connection show [yourInterfaceNameHere] Show Sample Output


    2
    showip() { nmcli connection show $1|grep ipv4.addresses|awk '{print $2}' ; }
    nnsense · 2015-05-13 16:24:28 8
  • This is a common use of bind. Hitting any key after will output the key's character sequence. This makes possible using it into a bind command. So pressing ctrl+v and then F2 will output "^[[12~", once binded every time you'll press the function key F2 it will execute your command. Added the \n to make it execute it as well. Show Sample Output


    1
    bind '"<ctrl+v><functionKey>":"command\n"'
    nnsense · 2015-05-11 17:59:09 7
  • I copied this (let's be honest) somewhere on internet and I just made it as a function ready to be used as alias. It shows the 10 most used commands from history. This seems to be just another "most used commands from history", but hey.. this is a function!!! :D Show Sample Output


    1
    mosth() { history | awk '{CMD[$2]++;count++;}END { for (a in CMD)print CMD[a] " " CMD[a]/count*100 "% " a;}' | grep -v "./" | column -c3 -s " " -t | sort -nr | nl | head -n10; }
    nnsense · 2015-05-11 17:41:55 12
  • Many times I give the same commands in loop to find informations about a file. I use this as an alias to summarize that informations in a single command. Now with variables! :D Show Sample Output


    2
    fileinfo() { RPMQF=$(rpm -qf $1); RPMQL=$(rpm -ql $RPMQF);echo "man page:";whatis $(basename $1); echo "Services:"; echo -e "$RPMQL\n"|grep -P "\.service";echo "Config files:";rpm -qc $RPMQF;echo "Provided by:" $RPMQF; }
    nnsense · 2015-05-11 16:46:01 8
  • I use this as an alias to get all .service files related a single installed file/conf (if it has services, of course). For rpm based systems ;) Show Sample Output


    1
    qf2s() { rpm -ql $(rpm -qf $1)|grep -P "\.service"; }
    nnsense · 2015-05-11 16:32:16 4
  • Not really alternative, just giving a different behavior listing current directory if no directory given.


    0
    cdls() { if [[ $1 != "" ]] ; then cd $1; ls; else ls; fi };
    nnsense · 2015-05-11 15:52:09 7

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Generate Random Text based on Length
Random text of length "$1" without the useless cat command.

Parse a quoted .csv file
The $2, $3, $4 fields are arbitrary but note that the first field starts from $2 and the last field is $NF-1. This is due to the fact that the leading and trailing quotes are treated as field delimiters.

External IP (raw data)

Set laptop display brightness
Run as root. Path may vary depending on laptop model and video card (this was tested on an Acer laptop with ATI HD3200 video). $ cat /proc/acpi/video/VGA/LCD/brightness to discover the possible values for your display.

Get a list of all browsable Samba shares on the target server.

Mount a .iso file in UNIX/Linux
"-o loop" lets you use a file as a block device

Most used command

Buffer in order to avoir mistakes with redirections that empty your files
A common mistake in Bash is to write command-line where there's command a reading a file and whose result is redirected to that file. It can be easily avoided because of : 1) warnings "-bash: file.txt: cannot overwrite existing file" 2) options (often "-i") that let the command directly modify the file but I like to have that small function that does the trick by waiting for the first command to end before trying to write into the file. Lots of things could probably done in a better way, if you know one...

Text graphing ping output filter
Nasty perl one-liner that provides a sparkline of ping times. If you want a different history than the last 30, just put that value in. It (ab)uses unicode to draw the bars, inspired by https://github.com/joemiller/spark-ping . It's not the most bug-free piece of code, but what it lacks in robustness it makes up for in capability. :) If anyone has any ideas on how to make it more compact or better, I'd love to hear them. I included a ping to google in the command just as an example (and burned up 10 chars doing it!). You should use it with: $ ping example.com | $SPARKLINE_PING_COMMAND

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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