Example:
text:ABCDEFGHIJKLMNOPQRSTUVWXYZ
encrypt:DEFGHIJKLMNOPQRSTUVWXYZABC
key:3
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text:ABCDEFGHIJKLMNOPQRSTUVWXYZ
encrypt:DEFGHIJKLMNOPQRSTUVWXYZABC
key:3
error: Could not load host key: /etc/ssh/ssh_host_dsa_key
$ ssh-keygen -A
ssh-keygen: generating new host keys: DSA
$ systemctl restart sshd
$ systemctl status sshd
Apr 08 16:13:15 localhost.localdomain systemd[1]: Started OpenSSH server daemon.
Apr 08 16:13:15 localhost.localdomain systemd[1]: Starting OpenSSH server daemon...
Apr 08 16:13:15 localhost.localdomain sshd[2767]: Server listening on 0.0.0.0 port 22.
Apr 08 16:13:15 localhost.localdomain sshd[2767]: Server listening on :: port 22.
curl -o /dev/null -s -w "%{time_namelookup},%{time_connect},%{time_starttransfer},%{time_total}" http://www.google.com $ vim curl-speed.sh
#!/bin/bash
URL=$1
curl -o /dev/null -s -w \
"DNS Resolve: %{time_namelookup}\n\
Client -> Server: %{time_connect}\n\
Server Respon: %{time_starttransfer}\n\
Total time: %{time_total}\n" \
"${URL}"
$ ./curl-speed.sh www.google.com
Client -> Server: 0.040
Server Respon: 0.069
Total time: 0.069