Linux 报错总结

docker 报错 ：Cannot connect to the Docker daemon at . Is the docker daemon running?

[root@lowkey ~]# docker pull b3log/solo
Using default tag: latest
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

解决方法就是，需要 reload 一下 daemon，然后 restart docker，执行下面的两个命令

systemctl daemon-reload

systemctl restart docker.service

然后 docker ps 发现可以了

[root@lowkey ~]# systemctl daemon-reload
[root@lowkey ~]# systemctl restart docker.service
[root@lowkey ~]# docker pull b3log/solo
Using default tag: latest
Trying to pull repository docker.io/b3log/solo ...
latest: Pulling from docker.io/b3log/solo
59bf1c3509f3: Pull complete
20ae5de21b22: Pull complete
3048de22201a: Pull complete
03951bdd8dc2: Pull complete
063aa39c8788: Pull complete
f746c70f3528: Pull complete
Digest: sha256:34b355456c312d2273c960b37a455067e2a06b9f50556c7a534aaee3252bbea1
Status: Downloaded newer image for docker.io/b3log/solo:latest
[root@lowkey ~]#

如果上述办法不行，可以运行 ps -elf |grep docker

如果存在进程

就运行 ps -elf |grep docker | awk '{print $4}'|xargs kill -9

然后再执行

systemctl daemon-reload

systemctl start docker.service

应该就可以了。