Allow sudo access without passwords in Ubuntu
To give a specific user access to sudo without having to enter a password you have to edit the /etc/sudoers configuration file. For security reasons you should only edit the file using the visudo command.
$ sudo visudo
In Ubuntu the following lines are placed at the bottom of /etc/sudoers by default. This gives your default [...]
Disable ext3 boot-time check with tune2fs
The ext3 file system forces an fsck once it has been mounted a certain number of times. By default this maximum mount count is usually set between 20-30. On many systems such as laptops which can be rebooted quite often this can quickly become a problem. To turn off this checking you can use [...]
List all open files with lsof
The lsof command stands for “list open files”. It can show all open files as well as sockets, memory mapped libraries, directories, pipes, and network sockets. It is an incredibly powerful tool which you can use to gather detailed information about what is happening on your system.
If you run lsof as a normal user [...]
Update your entire Gentoo Linux system
Gentoo Portage makes it fairly easy to update all the installed packages on your system. The emerge and revdep-rebuild tools are powerful and make the process of recompiling everything much less painful than it sounds.
The emerge and revdep-rebuild commands require root privileges so switch to root or use sudo.
The first step is to synchronize your [...]
Submit commands as root with sudo
Among the most valuable tools at a Linux administrators disposal is sudo. It lets ordinary users temporarily submit commands as root or another user.
To use use this command simply put sudo before any command you want to run with root permissions.
sudo command
To submit commands as another user use the ‘-u‘ option and the username. [...]