How to run sudo command without a password on a Linux or Unix

Posted on in Categories , , , , , , last updated April 18, 2017

I‘m a new Unix system user. How do I use sudo command without a password on a Linux or Unix-like systems? I log in as [email protected] and disabled root login for ssh. After login, I need to run some commands as root user. I am the only sysadmin using my server. How do I run or execute sudo command without a password for a user named Tom under Debian/Ubuntu/CentOS Linux cloud server?

Howto: Update firefox on Linux

Posted on in Categories , , , , , last updated July 30, 2007

Q. My Firefox version is 2.0.0.0 and I’d like to update the same to latest version. How do I upgrade my Firefox on Linux?

A. You can easily upgrade firefox on Linux.

Please note that installing Firefox 2 will overwrite your existing installation of Firefox. You won’t lose any of your bookmarks or browsing history, but some of your extensions and other add-ons might not work until updates for them are made available.

Update Firefox on Ubuntu / Debian Linux

You can use APT package handling utility i.e. apt-get command. You can also use a GUI package tool called Update Manager:
Just type the following two commands at terminal:
$ sudo apt-get update
$ sudo apt-get install firefox

You can also use GUI tool: Click on System > Administration > Update Manger > Click on Check button see for updates

Update Firefox on Fedora / Redhat / CentOS Linux

Use yum tool or gui tool for the same purpose:
# yum update
# yum update firefox

Update firefox from official Mozilla site

You can download firefox from official website. Just follow these firefox installation instructions.