Bits And Pix

Assuming you have set your xen VM (e.g. domu1) points to a logical volume.

from DOM0

Extending the domu1 logical volume to 40G

lvextend -L40G /dev/vg0/domu1

from domu1

Resize the Physical Disk

pvresize /dev/hda

Resize the desired LV

lvextend -L15G /dev/vg0u/store
// might want to unmount the volume first, but this works on ext3 on live disk
resize2fs /dev/vg0u/store

See also

LVM Guide

Great tutorial: Bash Scripting Tutorial

Test if a parameter is defined

test.sh

#!/bin/bash
if [ -n "${1}" ]; then
  echo $1
else
  echo "hum, nothing"
fi

test.sh will output “hum, nothing”

test.sh foo will output “foo”

yum install httpd
yum install mod_ssl

Source: Installing Apache, PHP, and MySQL on Fedora Core

Install via Yum

yum install mysql
yum install mysql-server

Run

service mysqld start

Set Root Password

mysqladmin -u root password MYPASSWORD

Change root Password

mysqladmin -u root -p'oldpassword' password newpass

Add group to user

usermod -a -G mygroup myuser

Change primary user group

usermod -g mygroup myuser

Source

List the file systems

df -h

Size given folder

du -sh /path/to/folder

Sort/List largest directories/subdirectories

du /var/log/ | sort -nr | less

Other Links

• Linux FileSystem commands

C:\PuTTY\pageant.exe d:\main.ppk 

source

Enable HTTPS

iptables -I INPUT 1 -s 0/0 -i eth0 -d 0/0  -p TCP --dport 443 -j ACCEPT

• -I INPUT 1: Insert at position #1 (do
• -s 0/0: Any source IPs
• -d 0/0: Any destination IPs
• -p TCP: TCP protocol
• –dport 443: Port number (for ssl, default is 443)

Related Links

• Command list tutorial
• IPTables low-level tutorial
• Load Balancing with IP Table

Here is the minimum configuration to enable SSL

Load the module and configure the certificate

Pre-requisites:

1. Disable your /etc/httpd/conf.d/ssl.conf by renaming it to ssl.conf.disabled (otherwise, Apache will take the properties from this file, and it can get quite confusing).
2. Open your firewall for https protocol
3. Get a certificate (Godaddy have the cheapest one, especially for wildcard ones)

Related links

• Good Instructions on how to setup SSL with Virtual Host
• Apache SSL FAQ

Tar and gzip the folder panda/ in the panda.tar.gz

tar -cvzf panda.tar.gz panda/

Untar

tar -xvzf panda.tar.gz

or (to change the base folder name)

tar -xvzf latest.tar.gz -C ./(folder name)

Source: lowfatlinux.com