Oct 10, 2013 | Ubuntu 12.04 Server Management
Need to change your hostname? Use the following command. # sudo hostname <new-hostname> Now edit /etc/hosts and change the line starting with “127.0.1.1”. # sudo nano /etc/hosts 127.0.1.1 old-hostname <- replace this line to your new-hostname Now reboot your server, for new host name to take effect. # sudo...
Oct 10, 2013 | Ubuntu 12.04 Server Management
Command line for creating new user account in Ubuntu. Create a user with a standard home directory in the /home folder and specifying the default shell. # sudo useradd <username> -m -s /bin/bash Create a password for the user # sudo passwd <username> Grant administrator privilege to user # sudo adduser <username>...
Oct 5, 2013 | Linux Shell Scripting, Ubuntu 12.04 Server Management
If you don’t have any additional disks, you can create a file somewhere on your filesystem, and use that file for swap space. The following dd command example creates a swap file with the name “swapfile” under /root directory with a size of 1024MB (1GB). # dd if=/dev/zero of=/root/swapfile bs=1M count=1024 1024+0 records in 1024+0 records out Change the permission of the swap file, only allow root access. # chmod 600 /root/swapfile Using mkswap command make this file as a swap file. # mkswap /root/swapfile Setting up swapspace version 1, size = 1048572 KiB no label, UUID=########-####-####-####-############ Enable the newly created swapfile. # swapon /root/swapfile Using your favourite text editor, append the following line to the /etc/fstab file, to make this swap file available as a swap area even after a reboot. # nano /etc/fstab /root/swapfile swap swap defaults 0 0 Verify the newly created swap area. # swapon -s Filename Type Size Used Priority /dev/xvdb partition 524284 0 -1 /root/swapfile file 1048572 0 -2 To verify whether the system takes all the swap space mentioned in the /etc/fstab without rebooting, you can do the following, which will disable and enable all the swap partition mentioned in the /etc/fstab #swapoff -a #swapon -a #swapon -s Filename Type Size Used Priority /dev/xvdb partition 524284 0 -1 /root/swapfile file 1048572 0...
Feb 22, 2013 | MySQL, Ubuntu 12.04 Server Management
Oops! I’ve forgotten MySQL root password. 1)Stop MySQL instance (if it is running) sudo service mysql stop 2)Startup MySQL instance manually with option –skip-grant-tables and –skip-networking sudo mysqld_safe --skip-grant-tables --skip-networking 3)While MySQL is running from step 2, login to MySQL mysql --user=root mysql 4)Execute the following SQL commands to update root password Update user set Password=PASSWORD('new-password') where user='root'; flush privileges; exit; 5)Remember to stop MySQL instance executed from step 2 after you complete step 4. Lastly run MySQL normally. sudo service mysql...
