Commands by doherty

Commands by doherty (6)

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Turn off your laptop screen on command

echo 'alias monitor_off="sleep 1; xset dpms force standby"' >> ~/.bash_aliases ; . ~/.bash_aliases # now monitor_off does what you think
This is sample output - yours may be different.
2

xset dpms force standby

doherty · 2013-04-24 22:46:51 12
Find C/C++ source code comments

This is a naive way of finding source code comments in source code files that use C-like comments: // and /*...*/
This is sample output - yours may be different.
2

perl -e 'my $in_comment = 0; while (<>) { $in_comment = 1 if m{\Q/*\E}; print if $in_comment; $in_comment = 0 if m{\Q*/\E}; }' *.cpp

doherty · 2011-07-08 00:17:27 7
uniq without pre-sorting

Reads stdin, and outputs each line only once - without sorting ahead of time. This does use more memory than your system's sort utility.
This is sample output - yours may be different.
4

perl -ne 'print if !$a{$_}++'

doherty · 2011-02-17 02:18:44 8
Are the two lines anagrams?

This works by reading in two lines of input, turning each into a list of one-character matches that are sorted and compared.
This is sample output - yours may be different.
1

(echo foobar; echo farboo) | perl -E 'say[sort<>=~/./g]~~[sort<>=~/./g]?"anagram":"not anagram"'

doherty · 2011-02-17 02:15:46 124
Syntax Highlight your Perl code

This uses Text::Highlight to output the specified Perl file with syntax highlighting. A better alternative is my App::perlhl - find it on the CPAN: http://p3rl.org/App::perlhl
This is sample output - yours may be different.
1

perl -MText::Highlight -E '$h=Text::Highlight->new(ansi=>1); my $text=do{local $/; open my $fh, "<", $ARGV[0]; <$fh>}; say $h->highlight("Perl", $text);' path/to/perl-file.pl

doherty · 2011-01-31 05:52:43 8
shell equivalent of a boss button

Nobody wants the boss to notice when you're slacking off. This will fill your shell with random data, parts of it highlighted. Note that 'highlight' is the Perl module App::highlight, not "a universal sourcecode to formatted text converter." You'll also need Term::ANSIColor. Show Sample Output
This is sample output - yours may be different.
```
mike@charron:~$ boss
00000000  54 50 35 84 2f cf 99 ea  3b e1 60 eb 08 f1 54 35  |TP5./...;.`...T5|
00000010  78 86 70 26 9e 24 f8 92  10 da 08 3c 63 10 49 32  |x.p&.$.....<c.I2|
00000020  40 e7 6d 2b e1 ef 6e ad  bf eb 4c 55 aa 41 f8 2e  |@.m+..n...LU.A..|
00000030  d3 2c ef 83 a7 85 de 3b  88 cd ff 7d f7 42 31 ed  |.,.....;...}.B1.|
00000040  77 be 21 4f a0 5a bd e7  a1 4e d6 73 2d 74 b0 be  |w.!O.Z...N.s-t..|
00000050  75 c6 6f 6e 38 ac 54 69  6f 00 51 95 ae 7d 13 d3  |u.on8.Tio.Q..}..|
00000060  d9 a4 2c 81 8a 07 38 55  b3 45 e3 62 97 2e 86 ca  |..,...8U.E.b....|
```
1

cat /dev/urandom | hexdump -C | highlight ca fe 3d 42 e1 b3 ae f8 | perl -MTime::HiRes -pne "Time::HiRes::usleep(rand()*1000000)"

doherty · 2010-12-29 21:26:18 7

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run remote linux desktop

First of all you need to run this command. X :12.0 vt12 2>&1 >/dev/null & This command will open a X session on 12th console. And it will show you blank screen. Now press Alt + Ctrl + F7. You will get your original screen. Now run given command "xterm -display :12.0 -e ssh -X user@remotesystem &". After this press Alt + Ctrl + F12. You will get a screen which will ask you for password for remote linux system. And after it you are done. You can open any window based application of remote system on your desktop. Press Alt + Ctrl + F7 for getting original screen.

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

String to binary

Cool but useless.

Quickly ping range of IP adresses and return only those that are online

Tested in Debian, ymmv. - c 1 : send only one ping;; -W 1: wait for one second and then exit ping, assuming target IP is not available; change as needed (-W 0.5 for half a second, smaller or greater value depending on network speed/latency)

Numbers guessing game

Felt like I need to win the lottery, and wrote this command so I train and develop my guessing abilities.

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

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"

Find all active ip's in a subnet

nmap for windows and other platforms is available on developer's site: http://nmap.org/download.html nmap is robust tool with many options and has various output modes - is the best (imho) tool out there.. from nmap 5.21 man page: -oN/-oX/-oS/-oG : Output scan in normal, XML, s|

simple backup with rsync

With this cron, rsync begins to sinchronize the contents of the local directory on /[VIPdirectory] with the directory /backup/[VIPdirectory] on the remote server X.X.X.X. Previously we need working on public/private-keys ssh to guarantee the acces to the remote server on X.X.X.X

ps -ef | grep PROCESS | grep -v grep | awk '{print $2}' | xargs kill -9

kills all pids matching the search term of "PROCESS". Be careful what you wish for :)

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