SSH configuration - use the Bitvise SSH Client tool to remotely log in to a Linux server under Windows

SSH configuration - remote login to Linux server under Windows Shell SSH is the main means to access remote Linux hosts, especially when users need to operate Linux and Windows hosts, it is very convenient to access Linux hosts through SSH on Windows. This article introduces How to generate SSH key pair under Linux host and configure SSH client in Windows to use public key to log in to remote Linux host. System Environment Server: CentOS 6.4 x86_64 OpenSSH SSH Client: Windows 7 64bit Tools: Bitvise SSH Client (download link : http://www.xdowns.com/soft/xdowns2009.asp?softid=112461&downid=20&id=137927 ) Add a common user first log in to the root account //Add a user named tommy, the home directory is /usr/tommy, If the folder does not exist, create a tommy folder

# useradd –d /usr/tommy -m tommy

//Modify the password of user tommy

# passwd tommy

Grant root privilege

Method 1: Modify the /etc/sudoers file, find the following line, and remove the previous comment (#)

quote

## Allows people in group wheel to run all commands
%wheel    ALL=(ALL)    ALL

Then modify the user to belong to the root group (wheel), the command is as follows:

quote

#usermod -g root tommy

After the modification is completed, you can now log in with the tommy account, and then use the command su - to obtain root privileges to operate.

Method 2: Modify the /etc/sudoers file, find the following line, and add a line under root, as shown below:

quote

## Allow root to run any commands anywhere
root    ALL=(ALL)     ALL
tommy   ALL=(ALL)     ALL

If you don't want to need to enter a password every time you sudo, change to

quote

tommy   ALL=(ALL)     NOPASSWD: ALL

After the modification is completed, you can now log in with the tommy account, and then use the command sudo - to obtain root privileges to operate.

Method 3: Modify the /etc/passwd file, find the following line, and change the user ID to 0, as shown below:

quote

tommy:x:0:33:tommy:/data/webroot:/bin/bash

Windows下使用Bitvise SSH Client生成公钥,私钥

1.启动Bitvise SSH Client -> Client key manager -> Generate New -> Generate 就会生成公钥,私钥
2.然后在 Generate New同级画面中选中生成的秘钥 -> Export -> Export public key(公钥), Export private key(私钥) -> 选中OpenSSH format格式(linux默认是OpenSSH,所以格式需要一样,如果格式不一样的key需要转格式,还不如重新再生成一次)->选择好点Export导出保存秘钥 -> 保存在哪儿都行,能知道就行.公钥和私钥都要保存一份.
3.生成密钥时Passphrase这个可以不写,写了就要记住(一般不写就行)


Linux普通用户主目录(usr/tommy)下创建公钥文件

1. chmod -R  777  /usr/tommy 给需要修改的文件夹赋予读写权限,这样其它用户才可以读写文件夹内容
2. mkdir .ssh 创建文件夹
3. vim authorized_keys
4. 将生成的public key(公钥)中 ssh-rsa开始到 Generated之前的秘钥(包括ssh-rsa,不包括Generated)复制到 authorized_keys 文件之中 wq!保存
5.查看文件夹权限：ssh的信任授权对相关文件夹的访问权限有一定的限制，最好设置如下(千万不要超过770)：

$ chmod 600 /.ssh/authorized_keys
$ chmod 700 /.ssh
$ chmod 700 /.ssh/id_rsa

            

Bitvise SSH Client远程连接Linux

1.在客户端工具中找到initial method 的下拉框选为publickey
2.Client key的下拉框选为本地public key(公钥)对应的,可能生成了多个,但实际上只需要一个(一个公钥,私钥可以给多个Linux用户使用,只要.ssh/authorized_keys文件的公钥一致就行)
3.Username写Linux账户
4.点击login登录就可以了.