參考網站：
CentOS 7 : SSH Server : Use SSHPass : Server World
1. 安裝 sshpass 套件
# yum install sshpass –enablerepo=epel
2. 使用命令列來輸入密碼，登入成功之後執行 free 指令查看記憶體使用狀況
# sshpass -p 123456 ssh 192.168.1.101 free
total used free shared buffers cached
Mem: 16122192 15946676 175516 252788 914424 12375072
-/+ buffers/cache: 2657180 13465012
Swap: 7340028 30684 7309344
[@more@]3. 使用密碼檔
# echo ‘123456’ > sshpass.txt
# chmod 600 sshpass.txt
# sshpass -f sshpass.txt ssh 192.168.1.101 free
4. 使用環境變數
# export SSHPASS=123456
# sshpass -e ssh 192.168.1.101 free
5. 更多參數
# sshpass -help
Usage: sshpass [-f|-d|-p|-e] [-hV] command parameters
-f filename Take password to use from file
-d number Use number as file descriptor for getting password
-p password Provide password as argument (security unwise)
-e Password is passed as env-var “SSHPASS”
With no parameters – password will be taken from stdin
-P prompt Which string should sshpass search for to detect a password prompt
-v Be verbose about what you’re doing
-h Show help (this screen)
-V Print version information
At most one of -f, -d, -p or -e should be used