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Test network throughput
dd if=/dev/zero bs=4096 count=262144 | ssh server.url.domain 'cat > /dev/null'
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Find files larger than 100mb and sort
find / -xdev -type f -size +100M -exec du -sh {} ';' | sort -rh | head -n50 -
Find reverse DNS of a host
for HOST in $(host -t A example.com | awk '{print $4;}'); do host "${HOST}"; done
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Using rsync to recursively retrieve files
rsync -r -v --dry-run user@address:/remote/path/to/files /local/path/to/files
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Find out what ciphers are supported
nmap --script ssl-enum-ciphers -p 443 www.example.com
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Get general SSL info
openssl s_client -showcerts -connect www.example.com
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Find every file written to in the last 5 minutes
find / -mmin -5
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Clean up gitlab cache
/usr/share/gitlab-runner/clear-docker-cache
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Clean up old gitlab containers
sudo docker rm -v $(sudo docker ps --filter "status=exited" | grep -E "Exited \([0-9]\) [1-9] months ago" | awk '{print $1}')