SUSE Linux开启telnet服务

1、修改/etc/pam.d/login文件，将第二行注释掉。
suselinux:/etc/pam.d # more login
#%PAM-1.0
auth     requisite      pam_unix2.so            nullok #set_secrpc
#auth    required       pam_securetty.so
auth     required       pam_nologin.so
#auth    required       pam_homecheck.so
auth     required       pam_env.so
auth     required       pam_mail.so
account  required       pam_unix2.so
password required       pam_pwcheck.so          nullok
password required       pam_unix2.so            nullok use_first_pass use_authtok
session  required       pam_unix2.so            none # debug or trace
session  required       pam_limits.so
2、修改/etc/xinetd.d/telnet配置文件 。

suselinux:/etc/xinetd.d # more telnet
# default: off
# description: Telnet is the old login server which is INSECURE and should \
#        therefore not be used. Use secure shell (op
#        If you need telnetd not to "keep-alives" (e.g. if it runs over a
#        uplink), add "-n".  See 'man telnetd' for more d
service telnet
{
        disable         = yes
        socket_type     = stream
        protocol        = tcp
        wait            = no
        user            = root
        server          = /usr/sbin/in.telnetd
}
suselinux:/etc/xinetd.d #

将蓝色部分的yes改为no即可。
3、重启xinetd守候进程。

suselinux:~ # /etc/init.d/xinetd restart
Shutting down xinetd:                                                      done
Starting INET services. (xinetd)                                           done
suselinux:~ #
4、检查telnet服务当前状态。

suselinux:~ # chkconfig -l telnet
xinetd based services:
        telnet:             on
suselinux:~ #

5、结束。