improved sha256 checksum system and config cmd

test/nginx/nginx.service

@@ -0,0 +1,20 @@
+[Unit]
+ Description=nginx web server
+ After=network-online.target remote-fs.target nss-lookup.target
+ Wants=network-online.target
+
+[Service]
+ Type=forking
+ PrivateDevices=yes
+ PrivateTmp=true
+ SyslogLevel=err
+
+ ExecStart=/usr/bin/nginx
+ ExecReload=/usr/bin/nginx -s reload
+ Restart=on-failure
+ KillMode=mixed
+ KillSignal=SIGQUIT
+ TimeoutStopSec=5
+
+[Install]
+ WantedBy=multi-user.target