prestontimmons

#Newbie programmer
def factorial(x):
    if x == 0:
        return 1
    else:
        return x * factorial(x - 1)
print factorial(6)


#First year programmer, studied Pascal

prestontimmons

# Count lines in a Python file
find -name "*.py" | xargs cat | wc -l

prestontimmons

Add user:

/usr/sbin/useradd -gusers -Gmgmt -s/bin/bash -pxxxx -d/home/username -m username

Change username:

/usr/sbin/usermod -l <to> <from>

Delete a user and their home directory:

prestontimmons

# Set up an ssh tunnel between to servers

ssh -f user@personal-server.com -L 2000:personal-server.com:25 -N

# From http://www.revsys.com/writings/quicktips/ssh-tunnel.html

prestontimmons

Search and Replace Utilities

sed

The sed command makes it easy to modify text.

$ sed -i "s/django.conf.urls.defaults/django.conf.urls/g" urls.py

prestontimmons

# Get unique apache errors and count
sudo tail -100 /var/log/httpd/error_log | cut -d']' -f 4-99 | sed -e "s/, referer.*//g"|sort|uniq -c

prestontimmons

Postgres

Drop index:
  DROP INDEX title_idx;

prestontimmons

Ubuntu:
/etc/init.d/apache2 restart

Redhat:
/etc/init.d/httpd restart
/usr/sbin/apachectl restart

prestontimmons

#!/bin/bash
#
# supervisord   This scripts turns supervisord on
#
# Author:       Mike McGrath <mmcgrath@redhat.com> (based off yumupdatesd)
#
# chkconfig:	- 95 04
#
# description:  supervisor is a process control utility.  It has a web based
#               xmlrpc interface as well as a few other nifty features.

prestontimmons

# Check MySQL storage engine
SELECT TABLE_NAME, ENGINE FROM information_schema.TABLES;