Answers
How do you Secure Shell into another system? ssh <user>@<host>
How do you execute commands on a remote system via Secure Shell without actually opening a
new shell? ssh <user>@<host> <command>
How do you generate a public key and private key file for SSH authentication? ssh-
keygen
How do you export a public key for SSH authentication on a different machine? ssh-copy-
id <user>@<host>
How do you export a *specific* public key for SSH authentication on a different machine?
ssh-copy-id <user>@<host> -i <key file path>
If an SSH authentication key has a passphrase, how do you cache that passphrase on the local
machine for passwordless authentication? 1. eval $(ssh-agent)
2. ssh-add <key file path>
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What is Cockpit? A server Management Tool
How do you check if a service is running? systemctl status <service>
How do you start a service? systemctl start <service>
How do you enable a service on startup? systemctl enable <service>
Which directory contains persistent, system-specific configuration data? /etc
Which directory is the top of the system's file hierarchy? /
Which directory contains user home directories? /home
Which directory contains temporary files? /tmp
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Which directory contains dynamic data, such as for databases and websites? /var
Which directory is the administrative superuser's home directory? /root
Which directory contains regular commands and utilities? /usr/bin
Which directory contains non-persistent process runtime data? /run
Which directory contains installed software programs and libraries? /usr
How do you create a directory? mkdir <directory name>
How do you copy a file? cp <old file> <new file>
How do you copy a directory and its contents? cp -r <old directory> <new directory>
How do you move (or rename) a file or directory? mv <old file> <new file>
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How do you remove a file? rm <file>
How do you remove a directory containing files? rm -r <directory>
How do you remove an empty directory? rmdir <directory>
How do you create parent directories while creating a new directory? mkdir -p <new
parent directories>/<new directory>
How do you list the contents of a directory? ls
How do you list all contents of a directory including hidden files? ls -a
How do you list the contents of a directory and subdirectories? ls -R
How do you list the contents of a directory with more detailed information? ls -l