1 Storage & Disk Management#
1.1 Clean Up & Space Recovery#
# Purge unused packages and clean cache
apt autoremove --purge && apt autoclean
# Reclaim journal log space (limit to 500MB)
journalctl --vacuum-size=500M
1.2 Identify Large Files & Folders#
# List all files with human-readable sizes
ls -lah
# Summary of folder sizes in current directory
du -sh *
# Identify top 10 largest folders on root
sudo du -xh / | sort -rh | head -n 10
# Disk space usage summary (filtered for MB/GB)
du -cha --max-depth=1 / | grep -E "M|G"
1.3 Hugo Project Specifics (Size Checks)#
# Find files larger than 25MB in project
find /home/marc/hugo/canada2argentina -type f -size +25M -exec ls -lh {} +
# Count total files in the public build folder
find /home/marc/hugo/canada2argentina/public -type f | wc -l
# List top 25 largest files in project
find /home/marc/hugo/canada2argentina -type f -exec du -h {} + | sort -rh | head -n 25
1.4 Disk Health & Partitions#
# Wipe all partitions/signatures from a disk (CAUTION)
sgdisk --zap-all /dev/sdX
# Detailed SMART health report
smartctl -a /dev/sda | less
# Deep scan for bad blocks (Takes a long time)
badblocks -v /dev/sda -s
2 Proxmox & Virtualization#
2.1 VM / Container Management#
# Unlock a stuck VM or Container
qm unlock <vmid>
pct unlock <ctid>
# Resize a container disk (Final size, cannot shrink)
pct resize 103 rootfs 16G
# List running LXC containers
pct list | awk 'NR>1'
2.2 High Availability (HA) Fixes#
# Disable HA for a specific VM/CT to allow manual fixes
ha-manager set vm:200 --state disabled
ha-manager set ct:103 --state disabled
2.3 Repository & Templates#
# Update and list available CT templates
pveam update
pveam available
# List all active apt sources
grep -r '' /etc/apt/sources.list*
2.4 Proxmox Boot & Kernel#
# List and pin a specific kernel
proxmox-boot-tool kernel list
proxmox-boot-tool kernel pin 6.8.8-4-pve
3 Networking & Connectivity#
3.1 Troubleshooting & Discovery#
# Check DNS resolution
nslookup google.com
nslookup pi.hole
# Check open listening ports
ss -lntu
netstat -plant
# Performance test (Client mode, 8 parallel streams)
iperf3 -c 10.1.1.11 -P8
3.2 SSH & Remote Access#
# View real-time system logs for USB/Kernel errors
dmesg -w
dmesg -T | grep usb
# Clear "Remote Host Identification Changed" error
nano ~/.ssh/known_hosts
3.3 File Transfers (SCP)#
# Copy local images from Mac to Hugo site on Server
scp -v /Users/marc/Downloads/to_convert/* root@10.1.2.202:/home/marc/hugo/canada2argentina/static/images/
# Backup and transfer a folder between servers
tar -czvf "$(date +%Y-%m-%d_%Hh%M)_PangolinBackup.tar.gz" pangolin/
scp pangolin.tar.gz root@72.11.147.220:/home/marc/docker-compose
4 System & Hardware Info#
4.1 RAM & CPU#
# Clear RAM cache (Drop caches)
sync && echo 3 | tee /proc/sys/vm/drop_caches
# Check ZFS ARC summary and free RAM
arc_summary -s arc && free -h
4.2 BIOS & Hardware#
# Get BIOS version and serial info
sudo dmidecode -t bios
# List SCSI and PCIe hardware
lsscsi -u
lspci
4.3 Legacy iLO3 Fix (Firefox)#
- Type
about:config in address bar.
- Search:
security.tls.version.enable-deprecated.
- Set to:
true.
5 Miscellaneous Utilities#
5.1 Permissions & Scripts#
# Make script executable and run
chmod +x ./unifi-9.0.114.sh && ./unifi-9.0.114.sh
5.2 Scheduling & Processes#
# Instant test of cron behavior (Sends message to all terminals)
* * * * * echo "Hello from cron" | wall
# Cancel a pending shutdown
shutdown -c
5.3 Print the path of the folder you are in#
# Print the path of the folder you are in
pwd
6 SSD SMART Testing on Proxmox#
6.1 Identify the drive#
# Display the drive model, serial number, capacity, and type.
lsblk -d -o NAME,MODEL,SERIAL,SIZE,TYPE /dev/sdX
6.2 View the current SMART report#
# Display the complete SMART health report.
smartctl -x /dev/sdX
6.3 Run a short self-test#
# Start a short, read-only SSD self-test.
smartctl -t short /dev/sdX
6.4 Check the test status#
# Check whether the self-test is still running or has completed.
smartctl -c /dev/sdb
echo "===== /dev/sdb ====="; smartctl -c /dev/sdb | grep -E "Self-test execution|remaining"
6.5 Check the test status if many disks tests running#
#One disk check of test
echo "===== /dev/sdk ====="
smartctl -x /dev/sdk | grep -iE "Self-test execution status|remaining|Background long"
# Multi Check whether the self-test is still running or has completed.
for d in /dev/sdb /dev/sdc /dev/sdd /dev/sde; do
echo "===== $d ====="
smartctl -x "$d" | grep -iE "Self-test execution status|remaining|Background long"
done
6.6 Run an extended self-test#
# Start an extended, read-only SSD self-test.
smartctl -t long /dev/sdX
#many
for d in /dev/sda /dev/sdb /dev/sdc /dev/sdd /dev/sde; do
echo "===== Starting long test on $d ====="
smartctl -t long "$d"
done
6.7 Check the extended test status#
# Check whether the extended test is complete.
smartctl -c /dev/sdX
6.8 Abort#
# Stop the test (this will stop all test if multiple started together)
smartctl -X
#If multiple
for d in /dev/sda /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg /dev/sdh; do
echo "===== $d ====="
smartctl -X "$d"
done
6.9 View the final report#
# Display the final SMART report, including self-test results.
smartctl -x /dev/sdX
6.10 Save the report#
# Save the SMART report to a text file.
smartctl -x /dev/sdX > sdX-smart-report.txt
