You can use the nslookup command in Linux/Unix to look up IP addresses. The nslookup command can be used to find the IP address of a domain name or the domain name of an IP address. For example, to look up the IP address of a domain name, run the following command: nslookup example.com This … Read more
Environment variables are values that can affect the way running processes will behave on a computer. In Linux, you can set environment variables in several ways, including in the shell profile or startup script, or in the shell itself. Here are the steps to set an environment variable in the shell: Open a terminal window … Read more
To remove the first character from a file name in Linux, you can use the ‘rename’ command with a regular expression (regex) pattern. The ‘rename’ command can be used to modify the names of multiple files at once based on a pattern. Here’s an example that removes the first character from all file names in … Read more
To connect to a MySQL database from a remote system or computer, you’ll need to perform the following steps: Ensure that the remote system has access to the database server: The database server must be configured to allow connections from the remote system. The server’s firewall and security rules must also be configured to allow … Read more
When converting between Unix and Windows text files, you need to consider the differences in the line endings used by each system. Unix uses a line ending of a single line feed character (LF), while Windows uses a combination of a carriage return (CR) and a line feed (LF) character (CRLF). Here are some ways … Read more
You can use the who command to see if particular users are logged into the server. The who command will display information about users who are currently logged into the system, including their username, terminal, and the time they logged in. For example: $ who user1 tty1 2021-02-11 08:30 user2 tty2 2021-02-11 09:45 You can … Read more
To pass shell variables to an awk script in Bash, you can use the -v option of the awk command. The -v option allows you to pass shell variables to awk. Here’s an example of using the -v option to pass a shell variable to an awk script: #!/bin/bash # Define the shell variable string=”Hello … Read more
The grep command is a powerful tool in Linux that allows you to search for text patterns in files and output the lines that match the pattern. It is widely used by system administrators and developers for various tasks such as log analysis, code debugging, and searching for information in large data sets. Here are … Read more
The wget command can be used to download files from HTTPS domains. By default, wget will automatically verify the SSL certificate of the HTTPS site you’re downloading from, and will only download files if the certificate is valid. To download a file from an HTTPS site, simply specify the URL of the file you want … Read more
To mount a drive from the command line in Ubuntu, you can use the mount command. The basic syntax is: mount [OPTIONS] DEVICE MOUNTPOINT Where DEVICE is the name of the device you want to mount, and MOUNTPOINT is the location where you want to mount the device. For example, to mount a device located … Read more