List PCI devices linux
Network cards, GPUs, NVMe controllers with driver info
lspci -v | grep -A5 'VGA\|Ethernet\|NVMe'
more linux
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Set immutable file attribute
chattr +i /etc/resolv.conf && lsattr /etc/resolv.conf
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