Ubuntu系統（六）-安裝SSH服務端和客戶端及Telnet

sudo apt-get install openssh-server openssh-client

SSH服務端關閉與啓動

客戶端鏈接

安裝telnet

1. sudo apt-get install xinetd telnetd

2. 安裝成功後，系統也會有相應提示.

sudo vi /etc/inetd.conf並加入如下一行

telnet stream tcp nowait telnetd /usr/sbin/tcpd /usr/sbin/in.telnetd

3. sudo vi /etc/xinetd.conf並加入如下內容：

# Simple configuration file for xinetd

#

# Some defaults, and include /etc/xinetd.d/

defaults

{

# Please note that you need a log_type line to be able to use

log_on_success

# and log_on_failure. The default is the following :

# log_type = SYSLOG daemon info

instances = 60

log_type = SYSLOG authpriv

log_on_success = HOST PID

log_on_failure = HOST

cps = 25 30

}

includedir /etc/xinetd.d

修改前以下：

修改成

4. sudo vi /etc/xinetd.d/telnet並加入如下內容：

# default: on

# description: The telnet server serves telnet sessions; it uses \

# unencrypted username/password pairs for authentication.

service telnet

{

disable = no

flags = REUSE

socket_type = stream

wait = no

user = root

server = /usr/sbin/in.telnetd

log_on_failure += USERID

}

5. 重啓機器或重啓網絡服務sudo /etc/init.d/xinetd restart

6. 使用TELNET客戶端遠程登陸便可進行非root用戶訪問。

注意事項：安裝telnet時注意

apt-get install xinetd telnetd 不要分開

不然提示：telnet has no installation candidate

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