RAK部落小编记得之前在使用Linux服务器时SSH连接不会自动断开，但是由于后期公司更改网段后，连接Linux服务器后过一段时间就会自己断开，这就让小编很纳闷，后来凭借个人的经验，试了一下果然可以，具体操作就随RAK部落小编一起往下看把。
1、$TMOUT 系统环境变量
# 用以下命令判断是否是否设置了该参数 echo $TMOUT
# 如果输出空或0表示不超时，大于0的数字n表示n秒没有收入则超时
# 修改方法 vi /etc/profile
# —————————- export TMOUT=900
# —————————-
# 将以上900修改为0就是设置不超时 source /etc/profile
# 让配置立即生效
2、sshd 服务配置
cd /etc/ssh
# 查看sshd_config中关于客户端活动状态的配置 grep ClientAlive sshd_config # 默认配置如下
# —————————-
#ClientAliveInterval 0 #ClientAliveCountMax 3
# —————————-
# ClientAliveInterval指定了服务器端向客户端请求消息的时间间隔, 默认是0, 不发送。设置60表示每分钟发送一次, 然后客户端响应, 这样就保持长连接了。
# ClientAliveCountMax表示服务器发出请求后客户端没有响应的次数达到一定值, 就自动断开。正常情况下, 客户端不会不响应，使用默认值3即可。
# 备份原配置文件 cp sshd_config sshd_config.bak
# 启用客户端活动检查，每60秒检查一次，3次不活动断开连接 sed -i “s/
#ClientAliveInterval 0/ClientAliveInterval 60/g” sshd_config sed -i “s/
#ClientAliveCountMax 3/ClientAliveCountMax 3/g” sshd_config
# 确认修改 grep ClientAlive sshd_config
# 比较配置文件差异 diff sshd_config sshd_config.bak
# 重新加载ssd配置，让配置生效 service sshd reload
最后让配置生效即可完全解决解决SSH连接Linux超时自动断开的问题，RAK部落凭借个人的经验编写完成，这篇文章有没有帮到你呢？如果在操作过程中有任何问题请下方评论，小编看到会第一时间处理。
此文章来自固定链接：http://www.rakbuluo.com/p115
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