启动jenkins后无法访问，如何排错
linux服务器安装了jenkins，启动jenkins后无法访问，无法访问截图如下：
上面图片可以看到网络是没问题的
第二步：通过cat 命令查看日志发现日志中没有ip访问的信息，忘记截图了这一步没有截图。
第三步：网上搜索答案解决了我的问题，以下是别人文章解决方案：
1. 看日志是否有报错 ？
[root@istester ~]# tail -100f nohup.out
2020-06-08 03 :18 :52.337+0000 [id=15] WARNING hudson.security.csrf.CrumbFilter#doFilter: Found invalid crumb d432de6031e06511f6e8bdb01486a11636b9dfe5bda2411a9d80c5c49c9d586f. If you are calling this URL with a script, please use the API Token instead. More information: https: //jenkins.io/redirect/crumb-cannot-be-used-for-script
2020-06-08 03 :18 :52.337+0000 [id=15] WARNING hudson.security.csrf.CrumbFilter#doFilter: No valid crumb was included in request for / job/ idoxu_v1.0-bossxu/ descriptorByName/ hudson.plugins.git.UserRemoteConfig/ fillCredentialsIdItems by wyftest. Returning 403.
2. 看进程是否在 ？
[ root@istester ~] # ps -ef|grep jenkins
root 16354 1 0 Jun03 ? 00 :11:53 java -jar /APP/idoxu/software/jenkins
3. 看端口被占用 ？
[ root@istester ~] # netstat -nltp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0 :22 0.0.0.0 :* LISTEN 30736 /sshd
tcp6 0 0 :::3306 :::* LISTEN 24987 /mysqld
tcp6 0 0 :::80 :::* LISTEN 16354 /java
tcp6 0 0 :::3000 :::* LISTEN 9416 /./gogs
4. 看防火墙是否关闭 ？
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1）Centos 7.x
关闭防火墙 systemctl stop firewalld.service
[root@istester ~]# systemctl stop firewalld.service
[root@istester ~]# systemctl status firewalld.service
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
Active: inactive (dead)
Docs: man :firewalld(1)
[root@istester ~]# systemctl start firewalld.service
[root@istester ~]# systemctl status firewalld.service
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
Active: active (running) since Tue 2020-04-14 23 :56 :26 CST; 1s ago
Docs: man :firewalld(1)
Main PID: 12615 (firewalld)
CGroup: / system.slice/ firewalld.service
├─ 12615 / usr/ bin/ python -Es / usr/ sbin/ firewalld --nofork --nopid
└─ 12812 / usr/ bin/ python -Es / usr/ sbin/ firewalld --nofork --nopid
Apr 14 23 :56 :25 istester systemd [1]: Starting firewalld - dynamic firewall daemon...
Apr 14 23 :56 :26 istester systemd [1]: Started firewalld - dynamic firewall daemon.
[root@istester ~]#
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2）Centos 6.x
关闭防火墙 service iptables stop
[root@iZ94b31ttqsZ]~ # service iptables status
iptables: Firewall is not running.
如上解决了我的问题，记录下方便后续查看,如果文章对你有帮助，可以关注我，已坚持日更19/365
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