You can find your IP address in Linux using the following methods: Using the ip command: ip addr show | grep ‘inet ‘ | grep -v 127.0.0.1 | awk ‘{print $2}’ This will show your IP address (or addresses) along with the associated network interfaces. Using the hostname command: hostname -I This will show your … Read more

The error logs generated by the mail() function in PHP can be found in various locations, depending on the operating system and configuration of your system. Here are some common locations where the error logs may be stored: /var/log/mail.log or /var/log/syslog: On many systems, the error logs generated by the mail() function will be stored … Read more

An IPv6 address is a 128-bit address that is used to identify devices on a network. Here is an example of an IPv6 address: 2001:0db8:85a3:0000:0000:8a2e:0370:7334 This is a valid IPv6 address that follows the format defined in the IPv6 standard. It is composed of 8 blocks of 4 hexadecimal digits separated by colons. The leading … Read more

You can change the default shell in Linux or UNIX to KSH (KornShell) using the following steps: Check if KSH is installed on your system: which ksh If KSH is not installed, you can install it using the package manager for your operating system (e.g., apt-get on Ubuntu, yum on Fedora, etc.). Verify that you … Read more

In the vi text editor, you can replace text in the following ways: Replace a single instance of a word: Position the cursor on the word you want to replace. Type r followed by the replacement text. Replace all instances of a word in a single line: Press the Esc key to enter normal mode. … Read more

In Vim or vi text editor, you can search for a word in the following ways: Normal mode search: Press the / key to initiate a forward search. Type the word you want to search for. Press Enter to initiate the search. Press n to move to the next match, or N to move to … Read more

The error “resolvconf: Error: /etc/resolv.conf must be a symlink” occurs when the /etc/resolv.conf file on a Linux system is not a symbolic link, which is the expected configuration for systems using the resolvconf package. The solution to this error is to create a symbolic link for /etc/resolv.conf pointing to /run/resolvconf/resolv.conf. This can be done using … Read more

In VI or VIM, you can insert the current date and time by using the following command: Press the Esc key to enter normal mode. Type : to enter command mode. Type r followed by the current date and time in the format you want to use. For example, to insert the current date and … Read more

You can create custom 404 and 403 error pages in NGINX on Linux or Unix by following these steps: Create the error pages that you want to use. You can create these as HTML files and save them in a location that is accessible to NGINX. Open the NGINX configuration file: sudo nano /etc/nginx/nginx.conf In … Read more

A KVM virtual machine can use a shared physical network device (also known as bridging) with the host in order to access the network directly, rather than through the host as in a NAT configuration. This allows the virtual machine to have its own IP address on the network, allowing it to communicate directly with … Read more