Linux/Bash Recipes

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Essential shell commands and utilities for file management, process control, system monitoring, and daily terminal workflows.

10 recipes

Cron Job Management

Beginner

Schedule, manage, and debug recurring tasks using cron and systemd timers for automated system maintenance.

4 steps|5 min|cron, scheduling, automation

$ crontab -l

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Disk Management with LVM

Intermediate

Manage logical volumes, extend filesystems, and monitor disk health using LVM and standard disk utilities.

5 steps|15 min|disk, lvm, storage

$ sudo pvs

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Firewall Configuration with nftables

Intermediate

Configure and manage firewall rules using nftables or ufw to control network traffic and protect services.

5 steps|10 min|firewall, nftables, ufw

$ sudo ufw status verbose 2>/dev/null || sudo nft list ruleset 2>/dev/null || sudo iptables -L -n

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Log Analysis with journalctl

Intermediate

Search, filter, and analyze systemd journal logs to diagnose service failures, boot issues, and system errors.

5 steps|10 min|logs, journalctl, debugging

$ journalctl -u nginx --no-pager -n 50

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Network Diagnostics Toolkit

Intermediate

Diagnose network connectivity, DNS resolution, port availability, and routing issues using standard Linux networking tools.

5 steps|10 min|network, diagnostics, dns

$ ip -brief addr

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Performance Tuning with sysctl

Advanced

Tune kernel parameters using sysctl to optimize network performance, file descriptor limits, and memory management.

5 steps|15 min|performance, sysctl, tuning

$ sysctl -a 2>/dev/null | grep -E 'net.core.somaxconn|vm.swappiness|fs.file-max|net.ipv4.tcp_max_syn_backlog'

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Process Management with systemd

Intermediate

Manage services and processes using systemd, including starting, stopping, enabling, and debugging service units.

5 steps|10 min|systemd, services, processes

$ systemctl list-units --type=service --state=running

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Security Hardening Checklist

Advanced

Audit and harden a Linux server by checking SSH configuration, open ports, running services, and filesystem permissions.

5 steps|15 min|security, hardening, audit

$ sudo sshd -T 2>/dev/null | grep -E 'permitrootlogin|passwordauthentication|pubkeyauthentication|port '

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System Monitoring Dashboard

Beginner

Build a quick system monitoring overview using standard Linux commands to check CPU, memory, disk, and network status.

4 steps|5 min|monitoring, system, cpu

$ uptime

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User Management and sudo

Beginner

Create, manage, and configure user accounts with proper sudo access and security settings.

4 steps|5 min|users, sudo, security

$ grep -v '/nologin\|/false' /etc/passwd | cut -d: -f1,6,7

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