What is the meaning of buffer in Linux?
In Linux, a buffer is a reserved section of computer memory used to temporarily store data while it is being transferred from one place to another. Buffering is used to manage the speed of data transfer while minimizing the consumption of resources. It helps ensure that a steady flow of data is maintained, even if the data’s arrival rate or destination output rate are different.
What should a Linux administrator know?
1. An in-depth understanding of the Linux operating system, including installation, configuration, security, and troubleshooting.
2. Experience with common network protocols, such as TCP/IP, SSH, HTTPS, DNS, DHCP, FTP, and SMTP.
3. Ability to manage and configure network devices, such as routers, firewalls, and switches.
4. Understand Linux file system concepts and disk partitioning strategies.
5. Knowledge of scripting languages such as Bash or Python.
6. Ability to use common Linux-based server software such as web servers, database servers, and mail servers.
7. Proficiency with system and network monitoring tools such as Nagios and Splunk.
8. Understanding of security best practices and how to implement them to protect systems and networks.
9. Experience working in virtualized environments such as VMware and Xen.
10. Basic knowledge in scripting languages like HTML and CSS.1. Linux operating system fundamentals and system administration.
2. Basic network concepts such as TCP/IP, routing and IP address configuration.
3. Command line usage and scripting.
4. Installation, configuration and troubleshooting of Linux-based application and services such as Apache, DNS, FTP, SSH, and Mail Server.
5. Knowledge of system security measures to protect the Linux environment.
6. Working knowledge of system monitoring tools, disaster recovery and backup procedures.
7. Good understanding of system architecture and the Linux kernel.
8. Good knowledge of popular Linux distributions such as Red Hat, Debian and Ubuntu.Troubleshooting is essential for Linux system administrators to find and fix issues with their systems with minimal downtime. Troubleshooting enables them to understand how applications, hardware, and software are interacting, and identify what might be going wrong. For example, they can use logging and monitoring tools to detect errors early on, or check system memory and CPU usage to identify potential performance issues. Troubleshooting also helps Linux system administrators stay on top of security and be sure their systems are running optimally.Linux system administration is the process of managing and maintaining a Linux computer system or server. System admins are responsible for configuring, monitoring, upgrading, patching, and maintaining the Linux operating system and various services such as network, web, mail, and ftp. Linux system admins are also responsible for the security of the system by setting up appropriate user and group permissions, network and server access, and firewalls. On larger networks, system admins may be responsible for managing other administrators for tasks such as switching, routing, load balancing, and load sharing.
How to install phpMyAdmin in CentOS 6?
1. Begin by updating your packages to ensure you are using the latest versions available:
# yum update
2. Next, use yum to install phpMyAdmin:
# yum install phpmyadmin
3. Now, open up the configuration file to adjust some settings:
# vi /etc/httpd/conf.d/phpMyAdmin.conf
4. Find the line for “Require ip” and change it accordingly to limit access to certain IP addresses.
5. After that, open up the phpMyAdmin configuration file to adjust some settings:
# vi /etc/phpMyAdmin/config.inc.php
6. Find the line for “$cfg['blowfish_secret']” and change it accordingly.
**Note: It is recommended that you should use a random string at least 32 characters long.
7. Restart the Apache web server to apply the new settings:
# service httpd restart
8. Open up a web browser and access phpMyAdmin. You should be able to do so by entering the following address:
http://your_server_ip_address/phpMyAdmin
This should take you to the phpMyAdmin login page. Enter your MySQL database credentials to access phpMyAdmin.