In this emacs article, let us review the following 7 Emacs navigation options.

1. Line navigation
2. Screen navigation
3. Word navigation
4. Special navigation
5. Paragraph navigation
6. Search navigation
7. Navigation from command line

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Managing log files effectively is an essential task for Linux sysadmin.

In this article, let us discuss how to perform following log file operations using UNIX logrotate utility.

• Rotate the log file when file size reaches a specific size
• Continue to write the log information to the newly created file after rotating the old log file
• Compress the rotated log files
• Specify compression option for the rotated log files
• Rotate the old log files with the date in the filename
• Execute custom shell scripts immediately after log rotation
• Remove older rotated log files

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Bash shell case statement is similar to switch statement in C. It can be used to test simple values like integers and characters.

Case statement is not a loop, it doesn’t execute a block of code for n number of times. Instead, bash shell checks the condition, and controls the flow of the program.

In this article let us review the bash case command with 5 practical examples.
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Once you’ve installed VMware ESXi Server and vSphere client, you can start creating VM instance and install a guest operating system on it ( e.g. Linux, Windows, etc.,) as explained in this article.
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You may want to disable ping replies for many reasons, may be for a security reason, or to avoid network congestion.

Someone can flood the network with ping -f as shown in “Ping Example 5” in our earlier Ping Tutorial article. If ping reply is disabled we can avoid this flooding.

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In this article, let us review following PostgreSQL date and time functions with practical examples.

• now()
• now()::date
• now()::time
• date_part()
• age()
• extract()
• date_trunc()
• to_char()
• to_timestamp()

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RPM command is used for installing, uninstalling, upgrading, querying, listing, and checking RPM packages on your Linux system.

RPM stands for Red Hat Package Manager.

With root privilege, you can use the rpm command with appropriate options to manage the RPM software packages.
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