kb.hurricane-ridge.com » Scripting

virtualenv-burrito example bootstrap

admin — Thu, 08 Sep 2011 15:32:10 +0000

curl -s https://raw.github.com/brainsik/virtualenv-burrito/master/virtualenv-burrito.sh | bash
source ~/.venvburrito/startup.sh
mkvirtualenv --no-site-packages fabric
pip install Fabric

You will likely want the python-dev .deb installed before starting this process.

When you want to switch back to your system python installation:

deactivate

Python Two-Liner to Convert from a Unix Time Stamp

admin — Thu, 10 Dec 2009 22:03:15 +0000

>>> import time >>> time.gmtime(1253548874) (2009, 9, 21, 16, 1, 14, 0, 264, 0)

Perl installation “best” practices

admin — Tue, 30 Dec 2008 20:36:27 +0000

An old post, but one whose recommendations seem to work well – especially the part about installing as a non-root user – if you’re faced with an inflexible packaging of a system Perl that you don’t want to touch, like an RPM install. (Not needing to worry about things like this most of the time is one of the greatest strengths of FreeBSD’s ports system.) From the Journal of jdavidb: Perl installation “best” practices.

Bash Programming Cheat Sheet

admin — Tue, 30 Dec 2008 20:28:41 +0000

A quick overview of Bash shell syntax: JustLinux’s Bash Programming Cheat Sheet.

Upgrading Perl 5.6 to Perl 5.8 Using Portupgrade and perl-after-upgrade

admin — Mon, 29 Dec 2008 18:36:48 +0000

Use the -o flag to portupgrade to replace the perl5 port with a the perl5.8 port:

# portupgrade -rR -o lang/perl5.8 lang/perl5

After the upgrade (this is applicable after any Perl ports upgrade, such as 5.8.8 to 5.8.9), run the perl-after-upgrade script, first in test mode, then in fix mode:

# perl-after-upgrade # perl-after-upgrade -f

Fix any errors highlighted by perl-after-upgrade, and reinstall any required packages. Review files left behind from the older Perl installation (typically /usr/local/lib/perl5/site_perl/5.X.Y/). After verifying that the upgraded Perl works as expected, remove +CONTENTS.bak files from subdirectories under /var/db/pkg.

See the perl-after-upgrade man page for more details.

Loop Over Each Line in a File using Bash

admin — Sun, 28 Dec 2008 23:40:52 +0000

Use exec as below, for example:

exec < $PASSWORD_FILE
while read LINE; do
  user=`echo $LINE | cut -d: -f1`
  uid=`echo $LINE | cut -d: -f3`
  pgroup=`echo $LINE | cut -d: -f4`
  homedir=`echo $LINE | cut -d: -f6`
  shell=`echo $LINE | cut -d: -f7`
  gecos=`echo $LINE | cut -d: -f5`
  cmd="/usr/sbin/useradd -u $uid -g $pgroup -d $homedir -s $shell -c $gecos $user"
done

You may need to store stdin within another file descriptor if you need your script to receive input from stdin after the loop runs.