Filter last occurrence on file


filter last occurrence containing the DHCP string
tac /var/log/syslog | grep -m 1 'DHCP'

filter 3 lines between the last occurrence containing the err or warn string
tac /var/log/syslog | egrep -m 1 -C 3 'err|warn'

Add nginx repository Ubuntu

 Add nginx repository Ubuntu # 1. Download the NGINX signing key curl https://nginx.org/keys/nginx_signing.key | gpg --dearmor | sudo tee /u...

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