Commands by dbr

Commands by dbr (4)

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sort lines by length

making it "sound" more "natural" language like -- additionally sorting the longest words alphabetically: this approach is using: * to get at all lines of input * post-"for" structure * short-circuit-or in sort: if the lengths are the same, then sort alphabetically otherwise don't even evaluate the right hand side of the or * -C sets all input and ouput channels to utf8
This is sample output - yours may be different.
3

perl -C -e 'print for sort { length $a <=> length $b or $a cmp $b } <>' < /usr/share/dict/words | tail

dbr · 2011-10-20 01:43:25 3
one-line log format for svn

dirrrty: use -p to chomp automatically, substitute all newlines away and then replace the "---" by a newline ? bingo! s/// => s/// is just a cooler way to write s///, s/// which is just the small brother of s///; s/// (comma is an operator!) have fun!
This is sample output - yours may be different.
0

svn log | perl -pe 's/\n//g => s/^-.*/\n/g'

dbr · 2011-10-20 01:20:52 0
Syntax Highlight your Perl code
This is sample output - yours may be different.
1

perl -mText::Highlight -E 'say Text::Highlight->new(ansi => 1)->highlight(Perl => do { local (@ARGV,$/) = shift; <> }) ' path/to/perl-file.pl

dbr · 2011-07-12 04:55:12 1
Find C/C++ source code comments

more idiomatic version of the same, using the flip-flop-operator; also printing lines with '//'-style comments
This is sample output - yours may be different.
0

perl -ne 'print if m{\Q/*\E}x .. m{\Q*/\E}x or m{\/\/}x' *.c

dbr · 2011-07-12 04:41:49 0

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open a screenshot of a remote desktop via ssh

standard image viewers do not seem to be able to open a FIFO file. xloadimage was the first one i've stumbled upon that can handle this.

Search and Replace across multiple files

- grep for the word in a files, use recursion (to find files in sub directories), and list only file matches -| xargs passes the results from the grep command to sed -sed -i uses a regular expression (regex) to evaluate the change: s (search) / search word / target word / g (global replace)

Create an alias, store it in ~/.bash_aliases and source your new alias into the ~/.bashrc

This is useful if you use a shell with a lot of other users. You will be able to run "topu" to see your running processes instead of the complete 'top -u username'. Read more on alias: http://man.cx/alias

Are the two lines anagrams?

This is just a slight alternative that wraps all of #7917 in a function that can be executed

Open Remote Desktop (RDP) from command line having a custom screen size

This example uses xfreerdp, which builds upon the development of rdesktop. This example usage will also send you the remote machine's sound.

List bash functions defined in .bash_profile or .bashrc

If you issue the "set" command, you'll see a list of variables and functions. This command displays just those functions' names.

How to stop MAC Address via IPTables

edit the /etc/sysconfig/iptables file and try to work whit this: -A INPUT -i (interface) -m mac (mac address) -j ACCEPT/DROP

commit message generator - whatthecommit.com

check open ports (both ipv4 and ipv6)

While `lsof` will work, why not use the tool designed explicitly for this job? (If not run as root, you will only see the names of PID you own)

Pick a random line from a file

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Commands by dbr (4)

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