System design and development by Kevin Duraj

Category Archives: Linux

Disable unattended upgrades

Written by admin on September 7, 2010 — Leave a Comment

$ vi /etc/apt/apt.conf.d/10periodic

APT::Periodic::Update-Package-Lists “1″;
APT::Periodic::Download-Upgradeable-Packages “0″;
APT::Periodic::AutocleanInterval “0″;

Also posted in Ubuntu

Count Characters

Written by admin on August 19, 2010 — Leave a Comment

echo -n “http://find1friend.com/count/chars” | tr -cd “/” | wc -c

#output = 4

Also posted in Bash

Changing default text editor to VIM

Written by admin on July 22, 2010 — Leave a Comment

sudo update-alternatives –config editor

Selection Path Priority Status
————————————————————
0 /bin/nano 40 [...]

Also posted in Ubuntu

Installing new hard drive

Written by admin on July 16, 2010 — Leave a Comment

sudo fdisk /dev/sdb
p primary partition (1-4)

sudo mkfs.ext4 -b 4096 /dev/sdb1
sudo mkdir /data2
sudo mount /dev/sdb1 /data2
sudo umount /data2
sudo lshw -C disk

Reference: https://help.ubuntu.com/community/InstallingANewHardDrive

Also posted in Ubuntu

Caching nameserver lookups

Written by admin on June 28, 2010 — Leave a Comment

sudo apt-get install dnsmasq
vi /etc/dnsmasq.conf

listen-address=127.0.0.1
vi /etc/dhcp3/dhclient.conf
prepend domain-name-servers 127.0.0.1;
vi /etc/resolv.conf

search yourisp.com
nameserver 127.0.0.1
nameserver xxx.xxx.xxx.xxx
sudo /etc/init.d/dnsmasq restart
dig google.com

-= REMOVE =-
apt-get remove –purge dnsmasq
apt-get clean

Reference: http://embraceubuntu.com/2006/08/02/local-dns-cache-for-faster-browsing/

Ubuntu MySQL does not start

Written by admin on June 1, 2010 — Leave a Comment

1. /etc/init.d/mysql stop
2. comment skip-innodb in your my.cnf
3. rm /var/lib/mysql/ib*
4. mysql_install_db –user=mysql
5. /etc/init.d/mysql start

Also posted in MySQL, Ubuntu

Running multiple instances of MySQL

Written by admin on May 28, 2010 — Leave a Comment

Ubuntu 10.04 settings /etc/mysql/my.cnf

[mysql.server]
use-manager
[manager]
default-mysqld-path = /usr/sbin/mysqld
socket = /tmp/manager.sock
pid-file = /tmp/manager.pid
password-file [...]

Also posted in MySQL

Search recursively through Bash and Perl source code

Written by admin on May 5, 2010 — Leave a Comment

.bashrc

#—————————————————————–#
# Search recursively through code omitting svn and comments.
#—————————————————————–#
function fs()
{
find . -exec grep -il “$1″ {} \; -print | grep -0v .svn \
| xargs grep -i “$1″ | grep -v “\#” | sed -e “s/:.*//g” | sort -u
}
#—————————————————————–#
# Search recursively through code comments only [...]

Also posted in Bash, Perl Development

ssh login with rsa pub key

Written by admin on April 30, 2010 — Leave a Comment

ssh-keygen -t rsa
cat ~/.ssh/id_rsa.pub | ssh REMOTE_SERVER ‘cat – >> ~/.ssh/authorized_keys’
ssh REMOTE_SERVER ‘chmod 700 .ssh’
ssh REMOTE_SERVER

Also posted in CentOS, Ubuntu

Ubuntu Server Edition

Written by admin on March 20, 2010 — Leave a Comment

Ubuntu Server Edition is changing the server market for businesses by delivering the best of free software on a stable, fully supported and secure platform.
Reference: http://www.ubuntu.com/getubuntu/download-server

Also posted in Ubuntu
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