SSH 免密登录 SHELL安装脚本
使用方法:执行安装脚本sshNopasswd_install.sh 即可生成 /usr/bin/sshNopasswd 这个脚本。(点击下载,或者文末自己复制也行)
这个功能也被ddcwRPM包包含
sshNopasswd [用户名@]主机名 [密码]
sh sshNopasswd_install.sh #只有第一次安装的时候才执行,安装好了,后面就可以直接用了 sshNopasswd 192.168.101.171 #用户名和SSH一样,可以省略,默认是当前用户,不跟密码的话,就会提示输入密码(推荐) ssh 192.168.101.171 #这台服务器连接192.168.101.171 现在及以后登录都不用输密码了(除非自己的密钥换了)
例子:
安装脚本,sshNopasswd连接服务器,并输入密码
测试:
之后ssh连接该服务器就不用输密码了
安装脚本sshNopasswd_install.sh内容如下:
#!/bin/bash #write by ddcw at 20200410 thiscript=$0 function exits(){ echo -e "[`date +%Y%m%d-%H:%M:%S`] \033[31;40m$1\033[0m" exit 0 } function install_sshNopasswd(){ [ -f /usr/bin/sshNopasswd ] && exits "this OS has /usr/bin/sshNopasswd" tail -n +19 ${thiscript} > /usr/bin/sshNopasswd chmod 777 /usr/bin/sshNopasswd echo -e "[`date +%Y%m%d-%H:%M:%S`] [\033[32;40mINSTALL FINISH\033[0m] \033[31;40m you can run \033[0m \033[32;40msshNopasswd -h\033[0m \033[31;40mto get help\033[0m" exit 0 } [ -z $1 ] && install_sshNopasswd #!/bin/env bash #write by ddcw at 20200410 dt=$(date +%Y%m%d-%H%M%S) function get_ssh_keygen() { tpe=$1 expect << EOF set timeout 30 spawn /usr/bin/ssh-keygen -t ${tpe} expect { "sa):" {send "\r";exp_continue} "passphrase):" {send "\r";exp_continue} "again:" {send "\r"} } expect eof EOF } function scp_file_auto(){ [ $# -eq 3 ] || echo_color red "script has internal err DDCW_0001" password=$3 dir_tmp=$1 host_and_dir=$2 expect << EOF set timeout 30 spawn scp ${dir_tmp} ${host_and_dir} expect { "(yes/no" {send "yes\r";exp_continue} "password:" {send "${password}\r"} } expect eof EOF } function ssh_command(){ # [ $# -eq 3 ] || echo_color red "script has internal err DDCW_0003" user=`echo $1 | awk -F "@" '{print $1}'` || echo_color red "script has internal err DDCW_0004" user_host=$1 commd=$2 password=$3 expect << EOF set timeout 30 spawn ssh ${user_host} ${commd} expect { "(yes/no" {send "yes\r";exp_continue} "password:" {send "${password}\r"} } expect "${user}@*" {send "exit\r"} expect eof EOF } function help_this_script() { echo '---------------------------------------' echo 'sshNopasswd [USER]@HOSTNAME [PASSWORD] ' echo "example: sshNopasswd $(whoami)@$(last | head -1 | awk '{print $3}') " echo '---------------------------------------' exit 0 } case $1 in -h|-H|h|H|help|HELP|-help|-HELP|--help|--HELP|help=y|HELP=Y|?|-?) help_this_script;; esac if [ ! -f ~/.ssh/id_rsa ] then mv ~/.ssh ~/.ssh${dt} get_ssh_keygen rsa get_ssh_keygen dsa fi if [ ! -f ~/.ssh/id_rsa.pub ] then mv ~/.ssh ~/.ssh${dt} get_ssh_keygen rsa get_ssh_keygen dsa fi if [ ! -f ~/.ssh/id_dsa ] then mv ~/.ssh ~/.ssh${dt} get_ssh_keygen dsa get_ssh_keygen rsa fi if [ ! -f ~/.ssh/id_dsa.pub ] then mv ~/.ssh ~/.ssh${dt} get_ssh_keygen dsa get_ssh_keygen rsa fi [ -f ~/.ssh${dt}/authorized_keys ] && cp ~/.ssh${dt}/authorized_keys ~/.ssh/authorized_keys ssh_rsa_pub=$(cat ~/.ssh/id_rsa.pub | awk '{print $1 " " $2}') ssh_dsa_pub=$(cat ~/.ssh/id_dsa.pub | awk '{print $1 " " $2}') [ -z ${2} ] && read -t 60 -p "please input ${1} password:" password [ -z ${2} ] || export password=$2 ssh_command $1 'mkdir -p touch ~/.ssh' ${password} ssh_command $1 '\[ -f ~/.ssh/authorized_keys \] || touch ~/.ssh/authorized_keys' ${password} ssh_command $1 " grep '${ssh_rsa_pub}' ~/.ssh/authorized_keys >/dev/null || echo '${ssh_rsa_pub}' >> ~/.ssh/authorized_keys" ${password} ssh_command $1 " grep '${ssh_dsa_pub}' ~/.ssh/authorized_keys >/dev/null || echo '${ssh_dsa_pub}' >> ~/.ssh/authorized_keys" ${passwd}