Provided by: ssh-tools_1.6-1_all 

NAME
ssh-certinfo - shows validity and information of SSH certificates
DESCRIPTION
Usage: ssh-certinfo [OPTIONS] CERT-FILE [...]
OPTIONS:
-c show colors
-h Show this message
-w days
warning threshold (default: 30)
-v Verbose output
Examples:
Default:
ssh-certinfo ~/.ssh/id_rsa-cert.pub
ssh-certinfo ~/.ssh/*.pub
Certificates which expire within the next 2 months (colored output):
ssh-certinfo -c -w 60 ~/.ssh/id_rsa-cert.pub
ssh-certinfo -c -w 60 ~/.ssh/*.pub
SSH-TOOLS January 2020 SSH-CERTINFO(1)