URLs open in Safari instead of Chrome from Mac OSX Terminal

To set the correct default browser on OSX, go to System preferences | General | Default web browser.

If the default browser is correct but Terminal is still not behaving correctly, then change the default browser, and change it back again.

TIOA-TIOA FTW

(source)

Don't grep, but filter terminal output and colour certain lines (and print all other lines too)

Ruby:

acoc source with dependency of term-ansicolor gem.

Perl:

tail -f /some/log | perl -MTerm::ANSIColor -ne'print color("red") if /error/i; print $_; print color("reset");'

or

tail -f /some/log | perl -MTerm::ANSIColor -pne's/foo/color("cyan")."foo".color("reset")/e;'

or

tail -f /some/log | perl -MTerm::ANSIColor -pne's/(error|bar)/color("green").$1.color("reset")/eig;'

Bash:

Emacs font-lock-keywords can easily be implemented in a 3 line bash script. Call it "highlight":

    # Usage: tail -f error.log | highlight "error"
    RED="$(tput setaf 1)"
    RESET="$(tput setaf 7)"
    sed "s/$1/$RED$1$RESET/"

Terminal does not wrap properly in linux

Sometimes lines don't wrap correctly in a bash terminal in linux - long lines overlap and overwrite the beginning of the line instead of continuing onto the next line.

To fix it:
shopt -s checkwinsize

To check it:
shopt  | grep checkwinsize
You should see:
checkwinsize    on

If it still isn't working, try:
reset

(source)

Colouring terminal output

• Emacs, in a term buffer: configure font-lock-keywords for term-mode
• spc (Supercat)
• grc (Generic Colouriser)
• highlight
• histring
• pygmentize
• grep --color

Thanks to StackOverflow

UPDATE: You can actually do this yourself with pretty much any programming language that has an ANSI colours library.

Enable scrolling in GNU screen

.screenrc: 
termcapinfo xterm* ti@:te@ 

Thanks 

Text-based web browsers

• http://w3m.sourceforge.net/
• http://lynx.browser.org/
• http://www.jikos.cz/~mikulas/links/

Coloured log output

Tail the log and pipe it through this:

#!/usr/bin/perl

use warnings;
use strict;
use Term::ANSIColor qw(color);

while( <> ) {
chomp;
s/\t/ /g;
(/ERROR|failed/) && do {
print( color( 'red' ). $_ .color( 'reset' )."\n" );
next;
};
(/WARN/) && do {
print( color( 'magenta' ). $_ .color( 'reset' )."\n" );
next;
};
(/succeeded/) && do {
print( color( 'green' ). $_ .color( 'reset' )."\n" );
next;
};
(/INFO/) && do {
print( color( 'yellow' ). $_ .color( 'reset' )."\n" );
next;
};
(/DEBUG/) && do {
print( color( 'blue' ). $_ .color( 'reset' )."\n" );
next;
};
print $_."\n";
}