1. Storage & Disk Management#
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
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"
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
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#
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'
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
Repository & Templates#
# Update and list available CT templates
pveam update
pveam available
# List all active apt sources
grep -r '' /etc/apt/sources.list*
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#
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
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
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#
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
BIOS & Hardware#
# Get BIOS version and serial info
sudo dmidecode -t bios
# List SCSI and PCIe hardware
lsscsi -u
lspci
Legacy iLO3 Fix (Firefox)#
- Type
about:config in address bar.
- Search:
security.tls.version.enable-deprecated.
- Set to:
true.
5. Miscellaneous Utilities#
Permissions & Scripts#
# Make script executable and run
chmod +x ./unifi-9.0.114.sh && ./unifi-9.0.114.sh
Scheduling & Processes#
# Instant test of cron behavior (Sends message to all terminals)
* * * * * echo "Hello from cron" | wall
# Cancel a pending shutdown
shutdown -c
Print the path of the folder you are in#
# Print the path of the folder you are in
pwd
