Service Configuration Files

systemd Service Units

• This files are used to manage services.
• They are located in /etc/systemd/system/.

Example (/etc/systemd/system/my-service.service):

[Unit]
Description=My Custom Service

[Service]
ExecStart=/usr/bin/my-service

[Install]
WantedBy=multi-user.target

/etc/crontab

• The /etc/crontab file is used to schedule periodic tasks using cron.

Example:

# m h dom mon dow user command
0 5 * * * root /path/to/script.sh

/etc/ssh/sshd_config

• This file configures the SSH daemon.

Example:

Port 22
PermitRootLogin no
PasswordAuthentication yes