linux下telnet安装与使用
时间:2015-03-02 14:33 来源:linux.it.net.cn 作者:IT
现在管理linux基本都用crt、xshell或者putty，已经没什么人用telnet，因为后续需要讲zabbix免客户端监控只telnet，通过telnet来监控服务器性能。
yum安装telnet
yum安装简单快速
view sourceprint?yum install telnet-server
配置telnet
telnet是放在xinetd里，将disable改为yes，如下：
view sourceprint?# vim /etc/xinetd.d/telnet
# default: on
# description: The telnet server serves telnet sessions; it uses \
# unencrypted username/password pairs for authentication.
service telnet
{
flags = REUSE
socket_type = stream
wait = no
user = root
server = /usr/sbin/in.telnetd
log_on_failure += USERID
disable = no
# 从yes改为no
}
如果需要使用root使用telnet登录，加上pts/0、pts1这样的，否则跳过这一步
view sourceprint?# cat /etc/securetty | grep pts
pts/0
pts/1
pts/2
pts/3
启动telnet
view sourceprint?# service xinetd start
Starting xinetd: [ OK ]
确认是否启动
view sourceprint?# netstat -lnt | grep :23
tcp 0 0 :::23 :::* LISTEN
创建普通用户
如果已经有用户了，那么可以跳过这一步
view sourceprint?# useradd ttlsa # 创建用户
# passwd ttlsa # 修改密码
Changing password for user ttlsa.
New password:
Retype new password:
passwd: all authentication tokens updated successfully.
telnet连接测试
使用root登录
view sourceprint?CentOS release 6.5 (Final)
Kernel 3.15.4-x86_64-linode45 on an x86_64
login: root
Password:
Last login: Thu Feb 12 08:37:11 from 58.246.52.46
[root@li220-237 ~]
#
普通用户登录
view sourceprint?CentOS release 6.5 (Final)
Kernel 3.15.4-x86_64-linode45 on an x86_64
login: ttlsa
Password:
$ w
08:41:05 up 199 days, 21:57, 2 users, load average: 0.00, 0.01, 0.05
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
ttlsa pts/1 51.241.12.49 08:40 1.00s 0.00s 0.00s w
root pts/0 51.241.12.49 08:27 1:37 0.01s 0.01s -bash
$
(责任编辑：IT)
| 现在管理linux基本都用crt、xshell或者putty，已经没什么人用telnet，因为后续需要讲zabbix免客户端监控只telnet，通过telnet来监控服务器性能。 yum安装telnet yum安装简单快速 view sourceprint?yum install telnet-server 配置telnet telnet是放在xinetd里，将disable改为yes，如下： view sourceprint?# vim /etc/xinetd.d/telnet # default: on # description: The telnet server serves telnet sessions; it uses \ # unencrypted username/password pairs for authentication. service telnet { flags = REUSE socket_type = stream wait = no user = root server = /usr/sbin/in.telnetd log_on_failure += USERID disable = no # 从yes改为no } 如果需要使用root使用telnet登录，加上pts/0、pts1这样的，否则跳过这一步 view sourceprint?# cat /etc/securetty | grep pts pts/0 pts/1 pts/2 pts/3 启动telnet view sourceprint?# service xinetd start Starting xinetd: [ OK ] 确认是否启动 view sourceprint?# netstat -lnt | grep :23 tcp 0 0 :::23 :::* LISTEN 创建普通用户 如果已经有用户了，那么可以跳过这一步 view sourceprint?# useradd ttlsa # 创建用户 # passwd ttlsa # 修改密码 Changing password for user ttlsa. New password: Retype new password: passwd: all authentication tokens updated successfully. telnet连接测试 使用root登录 view sourceprint?CentOS release 6.5 (Final) Kernel 3.15.4-x86_64-linode45 on an x86_64 login: root Password: Last login: Thu Feb 12 08:37:11 from 58.246.52.46 [root@li220-237 ~] # 普通用户登录 view sourceprint?CentOS release 6.5 (Final) Kernel 3.15.4-x86_64-linode45 on an x86_64 login: ttlsa Password: $ w 08:41:05 up 199 days, 21:57, 2 users, load average: 0.00, 0.01, 0.05 USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT ttlsa pts/1 51.241.12.49 08:40 1.00s 0.00s 0.00s w root pts/0 51.241.12.49 08:27 1:37 0.01s 0.01s -bash $ (责任编辑：IT) |