Set immutable file attribute linux

Prevent any user (incl. root) from modifying the file

chattr +i /etc/resolv.conf && lsattr /etc/resolv.conf

#linux #filesystem #security

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Show extended file attributes lsattr -R /etc/ 2>/dev/null | grep -v '^\-\-\-\-' ACL: show permissions getfacl /srv/shared ACL: grant user access setfacl -m u:alice:rwx /srv/shared Find SUID/SGID binaries find / -perm /6000 -type f -ls 2>/dev/null Find process by name pgrep -la nginx