sudo apt-get install openssh-server openssh-client
SSH服務端關閉與啟動
客戶端連接
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並加入以下一行
telnet stream tcp nowait telnetd /usr/sbin/tcpd /usr/sbin/in.telnetd
3. sudo vi /etc/xinetd.conf並加入以下內容：
# 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
修改前如下：
修改為
4. sudo vi /etc/xinetd.d/telnet並加入以下內容：
# 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. 重啟機器或重啟網絡服務sudo /etc/init.d/xinetd restart
6. 使用TELNET客戶端遠程登錄 即可進行非root用戶訪問。
注意事項：安裝telnet時注意
apt-get install xinetd telnetd 不要分開
否則提示：telnet has no installation candidate
