ACL: grant user access linux
Grant alice full access without changing group ownership
setfacl -m u:alice:rwx /srv/shared
more linux
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Find SUID/SGID binaries
find / -perm /6000 -type f -ls 2>/dev/null
Find process by name
pgrep -la nginx
Kill process tree
kill -TERM -$(pgrep -f 'my-app')
Change process priority
renice -n 10 -p <pid>
Limit process resources (cgroup)
systemd-run --scope -p MemoryMax=512M -p CPUQuota=50% -- ./heavy.sh