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rhcsa

Linux - June 19, 2012

This page is currently under development. I will be updating each section by supplying a link to examples and how to do each of the following points. Understand and Use Essential Tools Access a shell prompt and issue commands with correct syntax Use input-output redirection (>, >>, |, 2>, etc.) Use grep and regular expressions to analyze text Access remote systems using ssh and VNC Log in and switch users in multi-user runlevels Archive, compress, unpack and […]


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Linux - June 19, 2012

In order to start, stop, or even check the status of any service you would use the utility service.


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Linux - June 19, 2012

In order to stop or start virtual machines you can use either the virsh command or the virt-manager utility.


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Linux - June 19, 2012

You can access a virtual machines console in a variety of ways. You could use either virsh, virt-manager, virt-viewer, or even ssh.


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Linux - June 19, 2012

Logs are a good way to pin point issues or security breaches. You can configure what is logged by editing the /etc/rsyslog.conf file. The priority of the message will determine which file the logged text is going to be written to. There are 9 priorities that you should be familiar with. The priorities are none, debug, info, notice, warn, err, crit, alert, emerg where debug is the lowest priority and emerg is the highest.


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Linux - June 19, 2012

Identifying problems on a system is very important and can save headaches for the future. You can use utilities such as ps, top, kill, and renice to manage and monitor processes on your Linux system.


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Linux - June 19, 2012

Logging into to single user mode allows you to access the system as root without a password. This is especially useful when you need to troubleshoot or gain access to a system in order to fix a problem.


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Linux - June 18, 2012

Rebooting and shutting down a system can be handled in multiple ways. You can handle these tasks using tools like shutdown, reboot, and init.


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Linux - June 18, 2012

Switching runlevels is an essential skill for a Linux administrator. The ability to switch to runlevel 1 for installs or migrations helps admins keep their data secure which causes less possibilty for issue.


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Linux - June 18, 2012

Using the man, info, and document files is a good way in learning how to properly use the different tools available to you on a linux machine.


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