Shulou(Shulou.com)06/02 Report--

Remote connection to the server, the possible reasons are: sshd service is not open, firewall blocking, port is not open or occupied, selinux blocking. Here are some common causes and solutions.

1. SSHD service is not started

#service sshd status

#service sshd start

#service network restart

Set it to boot up automatically to avoid the same reason every time.

#chkconfig sshd on

You can check the status of sshd again:

#chkconfig --list sshd

sshd 0: Off 1: Off 2: On 3: On 4: On 5: On 6: Off

2. Firewall blocking #service iptables stop (close firewall and log in to remote service again) Related commands are as follows #iptables -L (check firewall status)#service iptables start (open firewall)

3, the port is occupied or not open

View the configuration port number of sshd (default is port 22)

#cat /etc/ssh/sshd_config

#netstat -antlp | grep 22

Open port #vi /etc/sysconfig/iptables", add a line-A INPUT -m state --state NEW -m tcp -p tcp --dport 2 -j ACCEPT #service iptables restart #service iptables status kill the process View pid #ps -aux #kill -s 9 1827(9 means termination, 1827 is pid)

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