Server Monitoring Guides & Tutorials — page 6
Practical playbooks for sysadmins, freelancers and small agencies running client servers: Linux metrics, uptime and SSL checks, cron and scheduled tasks, Docker, databases, alerting and incident response.
Articles
Check Disk Space on All Mounted Filesystems with df
Check disk space usage on all mounted filesystems on your Linux server to monitor storage across all partitions and prevent disk space issues.
Docker Security Audit: Check Daemon & Container Config
Audit Docker security configuration. Verify container security, prevent container escape, ensure proper hardening. Setup automated security audits with Zuzia.app.
Find Accounts With Empty Passwords on Linux
Automated solution to identify user accounts with empty or disabled passwords. Detect accounts that can be accessed without authentication, posing security risks.
Check Disk and TLS Encryption Status on Linux
Check encryption status compliance on Linux servers. Monitor encryption configuration, verify encryption enforcement, detect compliance violations. Setup monitoring with Zuzia.app.
Audit Fail2Ban Configuration: Jails, Bans & Settings
Check Fail2Ban security configuration in security audit. Verify Fail2Ban is properly configured, detect brute-force protection issues, ensure SSH security. Audit guide.
Check File Sizes in a Directory on Linux: ls, du & find
Find the biggest files in the current directory with ls -lhS, du -sh * and find -size, sort the results, and get a warning before a disk fills up.
How to Check Filesystem Health (ext4, XFS) on Linux
Check filesystem health for ext4 and XFS filesystems on Linux servers. Monitor filesystem integrity, detect corruption, verify mount status. Setup monitoring with Zuzia.app.
Firewall Security Audit: Check iptables, UFW & firewalld
Check firewall configuration in security audit. Verify iptables, UFW, or firewalld rules, detect misconfigurations, ensure proper network security. Security audit guide.
Detect Firewall Rule Changes: iptables-save and diff
Check firewall rules changes on Linux servers. Monitor iptables rule modifications, detect unauthorized changes, track rule history, and set up automated firewall change monitoring with Zuzia.app.
Check Kernel Messages with dmesg: Errors, OOM & Hardware
Automated solution to check kernel messages on your Linux server. Monitor system events, hardware issues, and driver problems automatically.
Check Kernel Module Status: lsmod, modinfo & dmesg
Check kernel module status on Linux servers. Monitor loaded modules, verify module health, detect module failures, and set up automated kernel module monitoring with Zuzia.app.
Check Kernel Version for Security Updates: uname & apt
Check kernel version in security audit. Verify you're running a supported and secure kernel, detect outdated kernels, ensure system security. Kernel security audit guide.
Show Listening Ports With Process Names: ss -tulnp
Step-by-step guide to check which ports are listening on your Linux server with detailed information including process names and connection states.
Check Listening Ports on Linux: ss, netstat & lsof
Check which ports are listening on your Linux server. Identify processes using ports, detect unauthorized applications, maintain network security.
Check LVM Logical Volume Status on Linux: lvs, vgs, pvs
Verify logical volumes, volume groups and physical volumes with lvs, lvdisplay, vgs and pvs, read the status flags, and monitor LVM health automatically.
Track Memory and Swap Usage Trends on Linux
Step-by-step guide to check memory and swap usage trends. Track memory consumption patterns, monitor swap usage, and plan capacity upgrades based on trends.
Check Memory Usage on Linux: free, ps & Top Consumers
Essential commands to check memory usage right now. See total RAM, available memory, swap usage, and top memory-consuming processes.
Check Configuration Sync Across Multiple Servers
Check that configuration, packages and time stay in sync across multiple servers using ssh, diff and ping - and alert on drift.
MySQL Security Audit: bind-address, Users & Settings
Check MySQL security configuration in security audit. Verify database hardening, detect misconfigurations, ensure proper access control. Database security audit guide.
Detect Network ACL Rule Changes on Linux: iptables & auditctl
Check network ACL rules changes on Linux servers. Monitor firewall rule modifications, detect unauthorized changes, verify rule consistency. Setup monitoring with Zuzia.app.
Interface Errors & Dropped Packets: ip -s link, ifconfig
Step-by-step guide to check network interface errors and dropped packets. Monitor network errors, detect network issues, and ensure reliable network connectivity.
Check Network Latency Between Servers: ping & traceroute
Step-by-step guide to check network latency between servers. Monitor network performance, detect latency issues, and optimize network connectivity.
Check Open Ports for Security: ss, nc & Port Diffs
Check network port security on Linux servers. Monitor listening ports, verify port access, detect unauthorized ports, and set up automated port security monitoring with Zuzia.app.
Check Network Segmentation Rules: iptables, nft, firewalld
Check network segmentation rules on Linux servers. Monitor firewall rules, verify ACL configuration, detect misconfigurations. Setup monitoring with Zuzia.app.