Commands by MarxBro

Commands by MarxBro (10)

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ASCII art of yourself

Use libcaca to render ascii chars on the webcam input... or don't.
This is sample output - yours may be different.
6

mplayer tv:// -vo caca

MarxBro · 2022-03-30 14:49:57 495
shuffle lines via perl

Same, without modules... Probably smarter option: just use the shuf command or even sort -R. Show Sample Output
This is sample output - yours may be different.
```
6
9
8
1
7
2
3
5
4
```
2

seq 1 9 | perl -e 'print sort { (-1,1)[rand(2)] } <>'

MarxBro · 2019-07-03 20:02:00 61
Delete all empty lines from a file with vim

If you need to delete lines that may contain space characters (such as tabs or spaces) as well as empty ones, try: :v/\S/d Just an alternative.
This is sample output - yours may be different.
5

:v/./d

MarxBro · 2013-09-08 23:22:02 7
Press enter and take a WebCam picture.

This command takes a 1280x1024 p picture from the webcam. If prefer it smaller, try changing the -s parameter: qqvga is the tiniest, vga is 640x480, svga is 800x600 and so on. Get your smile on and press enter! :)
This is sample output - yours may be different.
14

read && ffmpeg -y -r 1 -t 3 -f video4linux2 -vframes 1 -s sxga -i /dev/video0 ~/webcam-$(date +%m_%d_%Y_%H_%M).jpeg

MarxBro · 2013-01-17 11:37:09 14
Find out if a module is installed in perl

Shows the path if the module is installed or exit quietly (to simply avoid the 'No documentation found' msg). Show Sample Output
This is sample output - yours may be different.
```
$ perldoc -l Net::Pcap 2>/dev/null
/usr/lib64/perl5/site_perl/5.12.3/x86_64-linux-thread-multi/Net/Pcap.pm
$ perldoc -l Figaro 2>/dev/null
$ echo $?
1
```
4

perldoc -l Module::Name 2>/dev/null

MarxBro · 2013-01-11 23:28:13 11
Show all available colors on your terminal.

Using perl and tput, show all the colors with numbers that your actual $TERM can handle. If want to remove the numbers at beginning of new line, it should be something like this: perl -E 'say `tput setb $_`," "x `tput cols`, `tput sgr0` for 0 .. (`tput colors` - 1)'
This is sample output - yours may be different.
3

perl -E 'say $_,`tput setb $_`," "x(`tput cols`-length("$_")),`tput sgr0` for 0..(`tput colors`-1)'

MarxBro · 2012-11-22 01:55:51 7
FizzBuzz in Perl

Just another FizzBuzz in Perl. Show Sample Output
This is sample output - yours may be different.
```
1
2
Fizz
4
Buzz
Fizz
7
8
Fizz
Buzz
11
Fizz
13
14
Fizzbuzz
```
3

perl -E 'say$_%15?$_%3?$_%5?$_:Buzz:Fizz:Fizzbuzz for 1..100'

MarxBro · 2012-11-18 05:47:29 33
Print environment information.

Print environment (system) information using Perl.
This is sample output - yours may be different.
3

perl -e 'print map { $_ .= "$ENV{$_}\n" } (keys %ENV)'

MarxBro · 2012-10-13 23:38:28 7
Binary digits Matrix effect

Silly Perl variant.
This is sample output - yours may be different.
11

perl -e '$|++; while (1) { print " " x (rand(35) + 1), int(rand(2)) }'

MarxBro · 2012-09-27 22:46:39 33
Count number of files in a directory

Just want to post a Perl alternative. Does not count hidden files ('.' ones). Show Sample Output
This is sample output - yours may be different.
```
49
```
8

perl -le 'print ~~ map {-s} <*>'

MarxBro · 2012-02-21 21:09:48 6

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Create a mirror of a local folder, on a remote server

Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

fetch all revisions of a specific file in an SVN repository

Manages everything through one sed script instead of pipes of greps and awks. Quoting of shell variables is generally easier within a sed script.

Url Encode

Converts reserved characters in a URI to their percent encoded counterparts. Alternate python version: $ echo "$url" | python -c 'import sys,urllib;print urllib.quote(sys.stdin.read().strip())'

external projector for presentations

i spent way too many hours trying to fiddle with /etc/X11/xorg.conf trying to hook up various external projectors. too bad i didn't know this would solve all my problems.

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"

set a reminder for 5 days in the future

setup for reminder in 5 days, added the date in the future. To run a job at 4pm three days from now, you would do at 4pm + 3 days, to run a job at 10:00am on July 31, you would do at 10am Jul 31 and to run a job at 1am tomorrow, you would do at 1am tomorrow.

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

Rename files in batch

Edit a file inside a compressed archive without extracting it

If you vim a compressed file it will list all archive content, then you can pickup any of them for editing and saving. There you have the modified archive without any extra step. It supports many file types such as tar.gz, tgz, zip, etc.

cpu info

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