#troubleshooting
All articles tagged #troubleshooting — practical guides from production experience.
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68 posts tagged #troubleshooting · page 4 of 8
Linux Check Last Login Users: last, lastlog, who
Check last login history in Linux using last, lastlog, and who — find recent logins, failed attempts, and suspicious access patterns for security audits.
Linux Check File Size: ls, du, stat Command Examples
Check file size in Linux using ls -lh, du, and stat — understand apparent size vs disk usage, find files by size, and script size checks with real examples.
Linux Check Disk Usage by Folder: du Command Guide
Check disk usage by folder in Linux with du — sort directories by size, drill down to find what's consuming space, and use ncdu for interactive exploration.
Linux Check Disk I/O Usage: iostat Examples
Check disk I/O usage in Linux using iostat — read utilization, throughput, and latency metrics, identify saturated disks, and correlate I/O with application slowdowns.
journalctl Filter by Time Range: Real Examples
Filter journalctl output by time range, unit, priority, and keyword — with real command examples for production incident investigation and log triage.
How to Extract tar.gz in Linux: All Formats Covered
Extract tar.gz files in Linux — handle .tar.gz, .tar.bz2, .tar.xz, and .zip formats, extract to specific directories, and handle common extraction errors.
How to Delete Large Files in Linux Safely
Delete large files in Linux safely — handle open file handles, free disk space immediately with truncate, use rm correctly, and recover from accidental deletion.
How to Copy Files Recursively in Linux: cp, rsync Examples
Copy files recursively in Linux with cp and rsync — preserve permissions, sync directories, copy over SSH, and handle large transfers efficiently.
How to Check Uptime in Linux: uptime, w, and Beyond
Check Linux server uptime with uptime, w, and /proc/uptime — read load average correctly, find when the last reboot happened, and script uptime checks.