Check certificate details linux

Show cert expiry and subject for a live TLS endpoint

openssl s_client -connect example.com:443 </dev/null 2>/dev/null | openssl x509 -noout -dates -subject

#linux #network #security

more linux all 133 commands →

Awk — sum a column awk '{sum += $3} END {print sum}' file.txt Sed — replace in file sed -i 's/old-string/new-string/g' file.txt Sort and deduplicate sort file.txt | uniq -c | sort -rn | head -20 List block devices lsblk -o NAME,SIZE,TYPE,FSTYPE,MOUNTPOINT,UUID Show block device UUIDs blkid