To copy all hidden dot files using scp in Linux or Unix, you need to include the -r option to copy the directory recursively, and the -a option to preserve the file attributes such as permissions, timestamps, and symbolic links: scp -r -a user@source_host:/path/to/source/directory/ /path/to/destination/directory/ In this example, user is the username on the source … Read more

The error “E: Encountered a section with no Package: header” typically occurs when you try to use the apt-get command to update the package list on a Debian or Ubuntu system and there is a problem with the sources list. Here are some common solutions for resolving this error: Check the sources list: Make sure … Read more

To show mounted hard drive partitions in Linux, you can use the df command. The df command displays the amount of disk space used and available on all file systems, including hard drive partitions. Here’s an example of how to use the df command: # Display information about mounted file systems df -h In this … Read more

The lifetime of the ssh-agent process, and the keys it holds, can be set by using the -t or -t <seconds> option when starting the ssh-agent process. Here’s an example of how to start the ssh-agent process with a maximum lifetime of 3600 seconds (1 hour): # Start the ssh-agent process with a lifetime of … Read more

To temporarily switch off SELinux enforcement, you can use the setenforce command. This command changes the mode of SELinux enforcement on the fly, without requiring a reboot or restart of any services. Here’s an example of how to temporarily switch off SELinux enforcement: # Set SELinux to permissive mode setenforce 0 In this example, setenforce … Read more

You can get the current user name in a Linux or Unix shell script by using the whoami command or by accessing the $USER environment variable. Here’s an example using the whoami command: #!/bin/bash current_user=$(whoami) echo “The current user is: $current_user” And here’s an example using the $USER environment variable: #!/bin/bash current_user=$USER echo “The current … Read more

You can display colored man pages in Linux and Unix by using the GROFF_NO_SGR environment variable and piping the output of the man command through a pager, such as less. Here’s an example of how to display color man pages in a Linux or Unix system: export GROFF_NO_SGR=1 man <command> | less -R Where <command> … Read more

You can use the less command to view man pages with color in a Linux or Unix system. By default, the less command does not display man pages with color, but you can enable color with the LESS_TERMCAP_md environment variable. Here’s an example of how to view man pages with color using the less command: … Read more

You can use the id command to show the groups a user is in on a Linux system. The basic syntax of the id command is as follows: id username Where username is the name of the user you want to check. For example, to show the groups for the user johndoe, you would run … Read more

You can use the getent command to list all the users in a Linux system. The getent command retrieves entries from various administrative database sources, including the password database which stores information about the users on the system. Here’s an example of how to use the getent command to list all the users in the … Read more