By default, the history command in Bash shows a list of recently executed commands with their respective line numbers. However, it does not display the date and time when each command was executed. (www.utahcnacenters.com) To show the date and time for each command in the Bash history, you can set the HISTTIMEFORMAT environment variable. Here’s … Read more
The lsscsi command can be used to list all SCSI / SATA hard disks and CD / DVD drives on a Linux system. Here’s how to use it: Open a terminal on your Linux system. Type the following command and press Enter: lsscsi This will display a list of all SCSI / SATA devices on … Read more
If you have a named statistics dump file in Linux and want to convert the date and time in the file to a different format, you can use the date command. Here’s an example: Assuming you have a named statistics dump file named named_stats.txt with the following content: +++ Statistics Dump +++ (1614223000) … The … Read more
To enable jumbo frames on an AIX UNIX system, you can follow these steps: Check if your network adapter supports jumbo frames: To enable jumbo frames, you need to have a network adapter that supports it. You can check if your adapter supports jumbo frames by running the following command: entstat -d en0 | grep … Read more
The “Cannot load mysql extension. Please check your PHP configuration” error in phpMyAdmin usually occurs when the MySQL extension is not enabled in PHP. Here are some steps you can take to fix this error: Check if the MySQL extension is installed: You can check if the MySQL extension is installed on your system by … Read more
The “BAD FILE MODE” error in crond usually occurs when the file permissions on the crontab file or directory are incorrect. The error message indicates that the crontab file has a bad file mode, which means that it is either too permissive or not permissive enough for the crond daemon to access it. To fix … Read more
In Bash shell, you can use the read command to read input line by line, and then use the IFS (Internal Field Separator) variable to specify the delimiter character(s) that separate the fields. Here is an example script that reads input from a file called data.txt and extracts the fields delimited by commas: #!/bin/bash # … Read more
socat is a powerful and versatile utility that can be used for a wide range of network-related tasks, including TCP port forwarding. To use socat for TCP port forwarding, you can use the following command: $ socat TCP-LISTEN:local_port,fork TCP:remote_host:remote_port In this command, replace local_port with the port number on your local machine that you want … Read more
In Nginx, you can send custom HTTP headers to the client by using the add_header directive. Here is an example configuration that adds a custom X-My-Header HTTP header to all responses: server { listen 80; server_name example.com; location / { # Set the content of the custom header add_header X-My-Header “Hello, world!”; # … other … Read more
In Linux/UNIX, you can use the date command to convert epoch seconds to the current time. Here’s an example: #!/bin/bash # Set epoch seconds to a variable epoch_seconds=”1632718301″ # Use the date command to convert epoch seconds to human-readable time formatted_time=$(date -d @$epoch_seconds) echo “Epoch seconds: $epoch_seconds” echo “Formatted time: $formatted_time” In this example, we … Read more