🖥️ Typical Responsibilities of an L1 Linux AdministratorPosted by:

techclick.in – Your Guide to IT Infrastructure & Cybersecurity Careers

🧑‍💻 Core Responsibilities

🔍 System Monitoring & Basic Troubleshooting

• Monitor system health, disk usage, and performance metrics

• Investigate and resolve basic system-level issues

• Escalate critical incidents to L2/L3 support teams

👥 User & Access Management

• Create, modify, and delete user accounts

• Manage file permissions and ownership

• Configure SSH access and remote login settings

🔄 Service & Process Management

• Start, stop, and restart system services

• Monitor system logs via journalctl, dmesg, and /var/log

• Manage scheduled jobs using cron and at

🌐 Basic Networking & Security

• Configure basic network settings (IP, DNS, Gateway)

• Check and manage firewall rules (iptables, firewalld)

• Apply OS updates and security patches using yum, dnf, or apt

💾 Backup & File System Management

• Manage disk partitions and file systems (fdisk, lsblk, df, mount)

• Perform basic backup and restoration using tools like tar and rsync

📦 Software Installation & Updates

• Install and update software via package managers (rpm, dpkg, yum, apt)

• Ensure regular application of system and security updates

📘 Required Skills for an L1 Linux Administrator

✅ Command-line BasicsFamiliar with ls, cd, grep, find, vi, nano commands

✅ Permissions & OwnershipUnderstanding of chmod, chown, and Linux file permission structures

✅ Log File AnalysisKnow where to find and read logs (/var/log/messages, /var/log/secure, etc.)

✅ Package ManagementFamiliarity with YUM, APT, or DNF for software handling

✅ Scripting KnowledgeBasic scripting using Bash or Shell scripting for automation

✅ Networking FundamentalsKnowledge of IP addressing, SSH access, and basic firewall rules

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