23 FAQ tagged "root user"
Viewing 11-20 of 23 FAQ -- Linux Optimize Directories ( File Access Time ) in ext3 Filesystem
Q. I’m using CentOS Linux 5 server with ext3 on /disk2 (/dev/sdb1). How do I improve my file server performance. I’ve many large files in directories and how do I speed up access time?
- Linux List All Outdated Packages Which Could be Updated and Applied to System
Q. How can I know what packages are available for binary update under Fedora / RHEL / CentOS Linux version 5 server? How do I list all outdated packages? How do I apply update / patches to system?
- Debian / Ubuntu Linux: List All Packages Which Could be Updated and Applied to System
Q. How do I know what packages are available to be updated on my Debian / Ubuntu Linux system?
A. You can use standard command line utility called apt-get or GUI tool called Synaptic Update-Manager.
List all packages which could be updated
To list outdated package use apt-get command has following two options:
=> -u : Show upgraded [...] - Linux: Resetting a user’s password
Q. How do I reset a user’s password under any Linux distribution from command prompt?
A. To reset a user’s password, use passwd command. You have to change it to a different password.
Login as the root user
Open terminal or shell prompt
Type the following command:
# passwd username
For example, reset a tom’s password, enter:
# passwd tom
Type a [...] - Linux Copy One Hard Disk to Another Using dd Command
Q. How can I copy one hard disk to another using dd command?
A. dd command can copy disk in raw format. It will copy partition table and bootloader and all partitions within this disk. For example, you can copy /dev/sda to /dev/sdb (same size) using the following dd command. dd should complete with no errors, [...] - CentOS Linux apply package updates
Q. I’ve CentOS Linux 5 Server and I’d like to apply all package and security update. How do I apply package updates from the Internet?
A. CentOS comes with yum command. It is a command-line interface to update packages. There is also a graphical tool called pup.
yum command
For a command-line interface over the ssh session, the [...] - Howto: Linux Write protect a file
Q. How do I write protect a file under Linux? I’m using CentOS 5 server Linux operating system. I need prevent accidental changes to my files.
A. There are two ways to write protect a file under Linux.
Method #1: You can make file readonly by removing users’ write permission for a file. Under Linux and [...] - Howto disable the iptables firewall in Linux
Q. Quick question: I need to disable firewall in Linux for testing purpose. I’m using CentOS 4.4. How do I disable the firewall in Linux?
A. A Linux firewall is software based firewall that provides protection between your server (workstation) and damaging content on the Internet or network.
It will try to guard your computer [...] - Ubuntu Linux root password - default password
Q. I have just installed Ubuntu Linux. But, what is the default root password? I can only login as a normal user.
A. This is the mystery for most users - you didn’t set a root password, so what is it?
The root user can do anything as this a/c has full access to system. So [...] - How to make a Linux File unchangeable ( unalterable ) so that no one can modify it
Q. How do I write protect file under Linux so that no one can modify it?
A. You need to use chattr command, which changes the file attributes on a Linux second extended file system. The chattr command supports various attributes.
A file with the i attribute cannot be modified: it cannot be deleted or [...]
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