System Administration

System Administration involves managing, maintaining, and securing computer systems and networks in an organization. This guide covers essential aspects of both Linux and Windows system administration.

Linux administration is a crucial skill for system administrators. It involves managing Linux servers, user accounts, permissions, and services.

# User Management
sudo useradd -m username
sudo usermod -aG sudo username

# File Permissions
chmod 755 /path/to/file
chown user:group /path/to/file

# Service Management
systemctl start service-name
systemctl enable service-name

For detailed Linux administration guides, see:

• Linux Basics
• Shell Scripting
• Package Management

Windows Server administration includes managing Active Directory, Group Policy, and Windows services.

# Get Service Status
Get-Service | Where-Object {$_.Status -eq "Running"}

# Active Directory User Management
New-ADUser -Name "John Doe" -SamAccountName "jdoe" -UserPrincipalName "jdoe@domain.com"

# Group Policy Update
gpupdate /force

For detailed Windows administration guides, see:

• Active Directory
• PowerShell
• Windows Server

Network administration involves managing network infrastructure, protocols, and security.

For detailed networking guides, see:

• TCP/IP Networking
• DNS & DHCP
• Network Security

Security management is crucial for protecting systems and data from unauthorized access and threats.

System monitoring helps maintain system health and performance through continuous observation and analysis.

# Check System Resources
top
htop
df -h
free -m

# Monitor Logs
tail -f /var/log/syslog
journalctl -f

Regular backups and tested recovery procedures are essential for data protection and business continuity.