To remove a directory from a tar ball in Unix/Linux using the tar command, you can use the –exclude option to exclude the directory from the archive. Here’s how to do it: Open the terminal and navigate to the directory where the tar ball is located. Use the tar command with the –exclude option to … Read more

To find out your IP address in Red Hat Linux, you can use the following command: ip addr show This will display the network interfaces available on your system, along with their corresponding IP addresses. Look for the IP address listed under the interface that is currently connected to the network. You can also use … Read more

The “libglade-WARNING **: could not find signal handler ‘gpass_authentication_on_response’” error occurs when the libglade library cannot find the signal handler for a particular function, in this case ‘gpass_authentication_on_response’. This can happen if the signal handler function is not defined in the Glade file or is not properly linked to the main program. To solve this … Read more

To open and view .chm files on Apple Mac OS X, you can use a third-party tool such as the Chmox application. Here are the steps to install and use Chmox: Download Chmox: You can download Chmox from various sources on the internet. One reliable source is MacUpdate (https://www.macupdate.com/app/mac/18874/chmox). Download the latest version of Chmox. … Read more

In Linux, you can parse an IP address using various command-line tools like awk, sed, or cut. Here are a few examples: Using awk You can use awk to parse an IP address from a file or output by specifying the field separator as a dot (.). For example, if you have a file called … Read more

In iptables, you can invert or negate a test for IP address, protocol, or interface using the ! symbol. This is useful if you want to match all traffic except for a particular condition. Here are a few examples of using the ! symbol in iptables: Invert IP Test You can invert the IP test … Read more

You can use Oracle/MySQL SQL commands in UNIX shell scripts by using the sqlplus or mysql command-line utilities. These utilities allow you to execute SQL commands from a shell script and get the output back into the script for further processing. Here’s an example of using sqlplus to execute a simple SQL query and store … Read more

In Bash, you can use the continue statement to skip the current iteration of a loop and move on to the next iteration. This is useful if you want to skip certain items in a loop that meet a particular condition, for example. Here’s an example of using continue in a for loop: for i … Read more

To display or echo the PATH environment variable in Linux/UNIX/*BSD, you can use the echo command in the terminal. The PATH variable contains a colon-separated list of directories that the system searches for executables. Here are the steps to display the PATH variable: Open a terminal window. Type the following command: echo $PATH This will … Read more

To add a new directory to the PATH environment variable in Linux, you can follow these steps: Open a terminal window. Check your current PATH by running the following command: echo $PATH This will display a list of directories separated by colons. These directories are searched in order when you type a command in the … Read more