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'''Basic server administration skills''' are essential for anyone managing a VPS or [[Choosing the Right Dedicated Server|dedicated server]]. This article covers the foundational knowledge every beginner should develop.

== Skill 1: Command Line Proficiency ==

The command line is your primary interface with the server. Master these fundamentals:

* '''Navigation:''' <code>cd</code>, <code>ls</code>, <code>pwd</code>, <code>find</code>
* '''File editing:''' <code>nano</code> (beginner-friendly) or <code>vim</code> (powerful)
* '''File management:''' <code>cp</code>, <code>mv</code>, <code>rm</code>, <code>mkdir</code>
* '''Viewing files:''' <code>cat</code>, <code>less</code>, <code>head</code>, <code>tail</code>
* '''Searching:''' <code>grep</code>, <code>find</code>, <code>locate</code>

Start with <code>nano</code> for editing configuration files — it displays shortcut keys at the bottom of the screen and requires no learning curve.

== Skill 2: Understanding File Permissions ==

Linux permissions control who can read, write, or execute files:

-rwxr-xr-- 1 owner group 4096 Jan 1 12:00 file.txt

* '''r''' (read) = 4
* '''w''' (write) = 2
* '''x''' (execute) = 1

Common permission settings:

* <code>644</code> — owner reads/writes, everyone else reads (files)
* <code>755</code> — owner full access, everyone else reads/executes (directories, scripts)
* <code>600</code> — owner only reads/writes (private keys, configs with passwords)

== Skill 3: Service Management ==

Learn to control services with systemd:

sudo systemctl start nginx # start service
sudo systemctl stop nginx # stop service
sudo systemctl restart nginx # restart service
sudo systemctl status nginx # check if running
sudo systemctl enable nginx # start on boot

Check logs for a specific service:

journalctl -u nginx --since "1 hour ago"

== Skill 4: Process Monitoring ==

Monitor what is consuming server resources:

* '''<code>htop</code>''' — interactive process viewer (install with <code>apt install htop</code>)
* '''<code>df -h</code>''' — disk space usage
* '''<code>free -m</code>''' — memory usage
* '''<code>ss -tulnp</code>''' — listening ports and associated processes
* '''<code>uptime</code>''' — system load averages

When load average exceeds your CPU core count, the server is overloaded.

== Skill 5: Log Analysis ==

Important log locations:

{| class="wikitable"
|-
! Log File !! Contents
|-
| /var/log/syslog || General system messages
|-
| /var/log/auth.log || Authentication attempts (SSH logins)
|-
| /var/log/nginx/access.log || Web server requests
|-
| /var/log/nginx/error.log || Web server errors
|-
| /var/log/mysql/error.log || Database errors
|}

Useful commands:

tail -f /var/log/syslog # follow log in real time
grep "Failed password" /var/log/auth.log # find failed logins
awk '{print $1}' access.log | sort | uniq -c | sort -rn | head # top IPs

== Skill 6: Basic Networking ==

Every administrator should know:

* '''<code>ping</code>''' — test if a host is reachable
* '''<code>traceroute</code>''' — trace the network path
* '''<code>dig</code> / <code>nslookup</code>''' — DNS lookups
* '''<code>curl</code>''' — test HTTP endpoints
* '''<code>ip addr</code>''' — show network interfaces

== Skill 7: Backup Basics ==

At minimum, set up regular backups:

# Simple backup with rsync
rsync -avz /var/www/ /backup/www/

# Compressed archive
tar czf backup-$(date +%Y%m%d).tar.gz /var/www/

Automate with cron:

crontab -e
# Add: daily backup at 3 AM
0 3 * * * rsync -avz /var/www/ /backup/www/

== Learning Path ==

# Set up a practice VPS (see [[Setting Up Your First VPS: A Beginner's Tutorial]])
# Complete the initial [[Server Security Best Practices|security hardening]]
# Practice the [[Linux Server Administration Guide|core Linux commands]]
# Break things on purpose and learn to fix them
# Gradually take on more complex tasks

== See Also ==

* [[Linux Server Administration Guide]]
* [[Server Security Best Practices]]
* [[Setting Up Your First VPS: A Beginner's Tutorial]]

[[Category:Server Management]]

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