MyTechForum
unix
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How do I determine which version of Amazon Linux I am running?
To determine which version of Amazon Linux you’re running, you can use the command below: grep -E -w ‘VERSION|NAME|PRETTY_NAME’ /etc/os-release The output...
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How do I remove old kernel packages on my CentOS/RHEL Linux server?
There is a yum package called yum-utils which contains the package-cleanup command. This command will allow you to pass arguments to it...
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How do I update the MOTD on an AWS EC2 Linux server?
When logging into an AWS Linux server you will see a default MOTD (message of the day) that looks like the example...
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How do I list the files in an installed package on my Ubuntu server or desktop?
To list the packages installed on a Ubuntu server or desktop, you use dpkg, which is the equivalent of RPM on a...
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How do I restart network services on my Ubuntu server or desktop?
Restarting the network service on Ubuntu is similar to Red Hat or CentOS. To do so from the command line, you can...
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How do I start the graphical X-Windows display on my Ubuntu server when I’m in command-line mode?
To run graphical mode on your Ubuntu server or desktop, you can run the following command: startx or init 5 This will...
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How do I print specific line numbers in a file using awk?
Using awk you can specify which lines you print. If you wanted to print lines 1-10, you could do this: awk ‘NR
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How do I print all lines except for the first line using the awk command?
Using the awk command, you can do many useful things, one of which is printing only what you want. If for example,...
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How do I set my MySQL session to use vi mode?
Using MySQL in vi mode is very useful as you can easily search for, modify, and run previous commands quickly. Enabling it...