A symbolic link, also known as a symlink, is a type of link in Unix-like operating systems that points to another file or directory. In this example, you will create a symbolic link to the /bin directory. To create a symbolic link, you can use the ln command with the -s option, which stands for … Read more

In the tcsh or csh shell, you can set a variable by using the following syntax: set variable_name = value For example, to set the variable name to the value John, you would use the following command: set name = John Note that spaces are important in this syntax, and you should make sure to … Read more

In the vi or vim text editor, you can jump to the end of a file using the following command: G Pressing G will move the cursor to the last line of the file. If you want to move to a specific line number, you can type nG, where n is the line number you … Read more

File Transfer Protocol (FTP) is a commonly used protocol for transferring files between a client and a server over a network. FTP is available on most Unix and Linux systems, and provides a simple way to transfer files to and from a remote server. Here’s a tutorial on some common FTP commands: Connect to an … Read more

The source command in Unix/Linux allows you to run commands from a file in the current shell environment. The source command is often used to run shell scripts and shell functions, and can be useful for configuring the shell environment, setting environment variables, and defining shell functions. Here’s an example of how to use the … Read more

L1, L2, and L3 are commonly used to describe the levels of technical support within an IT organization. These levels help categorize the nature of the support request, and determine which team member is best equipped to handle the request. Here is a general description of each level: L1 Support: Also known as “Level 1” … Read more

Unison is a popular file synchronization tool for Unix and Linux systems. It allows you to keep two directories in sync by copying changes made in one directory to the other. (fisheries) Here’s how to use Unison: Install Unison: To install Unison, use the package manager for your Linux distribution. For example, on Debian/Ubuntu, use … Read more

The “UNIX Red Books” is a colloquial term used to refer to the official documentation and guides produced by IBM for its AIX operating system, which is based on the UNIX operating system. These books are commonly known as the “Redbooks” due to the distinctive red covers they have. The Redbooks provide in-depth technical information … Read more

In Debian Linux, you can use the rm command to delete a directory. However, the rm command alone will only remove files, not directories. To delete a directory, you must use the rm command with the -r (or –recursive) option, which tells rm to remove the directory and its contents recursively. Here’s an example of … Read more

If you’re having trouble getting log messages to be recorded using /dev/log or /jail/apache/dev/log in a Unix or Linux system, there are several potential causes and solutions to consider: Check the syslog configuration: Make sure that the syslog daemon (e.g., rsyslogd or syslog-ng) is configured to log messages to the correct file or socket. You … Read more