Linux命令：ssh,scp使用及免密码登录
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一、ssh使用:
ssh -l USERNAME HOST
ssh [email protected] ‘COMMAND‘ 单引号
[[email protected] ~]# ssh 110.119.131.204 #第一次连接需发送主机认证
Theauthenticity of host ‘110.119.131.204 (110.119.131.204)‘ can‘t be established.
RSAkey fingerprint is 91:a3:75:4b:3c:50:fd:5a:60:1a:39:ab:d5:0b:83:16.
Areyou sure you want to continue connecting (yes/no)? y
[[email protected]]# cat known_hosts
110.119.131.195ssh-rsaAAAAB3NzaC1yc2EAAAABIwAAAQEA7WecSyXB82qLwTOmh/Mhh8ic80Oj/lhS2xTjVHLz5jy8aq6XxS8gOVErcJZU4qL/eG0aDEMiyUQ5OChq1IUu3U+dO0eHLgpCt6UMd/LAxYjB5rvXE6pCvESJpTRK/oJEhnnzjHXLxZG2tD8t2xy1Bvt8+6K+2TBX64z2uEav8Yy5DcH2zQzMP/4bkn7my0WPDlwRsFSDW2CE/0GWFqKL8PWt2r9DoUS4c5umwqPe4cqyvvLA960YmeNuMlnNBKp2XOBrTpLsigsIXO6lVqhEcWUU1bV7JRPmgQbZjCu5onw1Ez4929XkVroxX02E9IS6DBGN6U6tMIC8fMwUjjrbXQ==
二、scp使用:
scpSRC DEST -r递归 -a
[email protected]:/path/to/somefile /path/to/local
scp/path/to/local [email protected]:/path/to/somewhere
[[email protected] ~]# scp 10.109.131.204:/etc/fstab ./
[email protected]‘s password:
Permission denied, please try again.
[email protected]‘s password:
fstab 100% 854 0.8KB/s 00:00
[[email protected] ~]# ls
anaconda-ks.cfg Desktop install.log.syslog minsysbak rc.sysreboot
bincopy.sh fstab mbox rc.reboot test
cpbin.sh install.log minitest rc.sysdone testiso
[[email protected] ~]# ll fstab
-rw-r--r-- 1 root root 854 Dec 5 16:53 fstab
[[email protected] ~]# date
Mon Dec 5 16:53:28 CST 2016
ssh-keygen
-trsa
~/.ssh/id_rsa
~/.ssh/id_rsa.pub
-f /path/to/KEY_FILE
-P ‘‘: 指定加密私钥的密码
三、自动保存登录密码:
多命令实现自动保存登录密码：
[[email protected] ~]# ssh -keygen -t rsa
Bad escape character ‘ygen‘.
[[email protected] ~]# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
d8:f0:bb:be:4b:aa:c0:59:4d:55:de:77:13:36:d7:11 [email protected]
[[email protected] ~]# ls .ssh/
id_rsa id_rsa.pub known_hosts
[[email protected] ~]# scp .ssh/id_rsa.pub [email protected]:/root
[email protected]‘s password:
Permission denied, please try again.
[email protected]‘s password:
id_rsa.pub 100% 391 0.4KB/s 00:00
[[email protected] ~]# ssh 10.109.131.204
[email protected]‘s password:
Last login: Mon Dec 5 16:18:26 2016 from 10.109.131.209
[[email protected] ~]# cat id_rsa.pub >> .ssh/authorized_keys
[[email protected] ~]# exit
logout
Connection to 10.109.131.204 closed.
[[email protected] ~]# ssh 10.109.131.204 #无密码进入
Last login: Mon Dec 5 17:09:57 2016 from 10.109.131.209
单命令实现自动保存登录密码：
[[email protected] ~]# ssh-keygen -t rsa -f .ssh/id_rsa -P ‘‘
Generating public/private rsa key pair.
Your identification has been saved in .ssh/id_rsa.
Your public key has been saved in .ssh/id_rsa.pub.
The key fingerprint is:
f8:b2:7d:64:20:ec:5f:09:3f:3f:2b:96:df:33:60:d3 [email protected]
[[email protected] ~]# ssh 10.109.131.204
Last login: Mon Dec 5 17:11:14 2016 from 10.109.131.209
[[email protected] ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub [email protected]
[email protected]‘s password:
Now try logging into the machine, with "ssh ‘[email protected]‘", and check in:
.ssh/authorized_keys
to make sure we haven‘t added extra keys that you weren‘t expecting.
[[email protected] ~]# netstat -tnl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:57583 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN
tcp 0 0 :::111 :::* LISTEN
tcp 0 0 :::22 :::* LISTEN
tcp 0 0 ::1:25 :::* LISTEN
tcp 0 0 :::45668 :::* LISTEN
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