1.docker exec介绍
docker exec命令是用来在运行中的容器运行命令
2.docker exec用法
docker exec [参数]
[root@centos79 ~]# docker exec --help
Usage: docker exec [OPTIONS] CONTAINER COMMAND [ARG...]
Execute a command in a running container
Aliases:
docker container exec, docker exec
Options:
-d, --detach Detached mode: run command in the background
--detach-keys string Override the key sequence for detaching a container
-e, --env list Set environment variables
--env-file list Read in a file of environment variables
-i, --interactive Keep STDIN open even if not attached
--privileged Give extended privileges to the command
-t, --tty Allocate a pseudo-TTY
-u, --user string Username or UID (format: "<name|uid>[:<group|gid>]")
-w, --workdir string Working directory inside the container
[root@centos79 ~]#3.实例
3.1.进入运行中的容器
命令：
docker exec -it a498 /bin/bash
[root@centos79 ~]# docker ps -a | grep a498
a4984c765518 daocloud.io/library/centos:latest "bash" 20 hours ago Up 20 minutes centos-ztj
[root@centos79 ~]# docker exec -it a498 /bin/bash
[root@a4984c765518 /]# hostname
a4984c765518
[root@a4984c765518 /]#3.2.查看运行容器中的目录
命令：
docker exec a498 ls /
[root@centos79 ~]# docker exec a498 ls /
bin
dev
etc
home
lib
lib64
lost+found
media
mnt
opt
proc
root
run
sbin
srv
sys
tmp
usr
var
[root@centos79 ~]#
