Docker 容器的使用
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1.容器的基本信息
[root@host1 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
9ac8245b5b08 img-layers-test "python /app/app.py" 45 hours ago Exited (0) 45 hours ago crazy_kowalevski
49e91767b48d ubuntu "/bin/bash" 2 days ago Exited (0) 2 days ago frosty_lichterman
38b001022f7a hello-world "/hello" 2 days ago Exited (0) 2 days ago intelligent_brahmagupta
2.创建并同时启用容器
1.启动容器执行命令后自动终止容器
[root@host1 ~]# docker run ubuntu /bin/echo
这是一个自动终止的容器
2.启动容器并允许用户与容器进行交互
[root@host1 ~]# docker run -it ubuntu /bin/bash
root@7ab5ac9bc007:/# ls
bin dev home lib64 mnt proc run srv tmp var
boot etc lib media opt root sbin sys usr
root@7ab5ac9bc007:/# exit
exit
3.启动容器并让其以守护进程的形式在后台进行
启动一个 Web 服务器的容器
[root@host1 ~]# docker run -d -p 80:80 --name testweb httpd
Unable to find image 'httpd:latest' locally
latest: Pulling from library/httpd
ce1261c6d567: Pull complete
aeb6d226161f: Pull complete
4f4fb700ef54: Pull complete
56926e6ce68f: Pull complete
4938babf7b43: Pull complete
307fcc49c641: Pull complete
Digest: sha256:027c678f36d3cd3dd2b44ad1e963e81be66f9eba065381c1126d3019fffeb01a
Status: Downloaded newer image for httpd:latest
65a371a8cacbd13cb81b7adcf599f913491667de97c4eb27903bcf5cd8ad9e9a
65a371a8cacbd13cb81b7adcf599f913491667de97c4eb27903bcf5cd8ad9e9a 是返回唯一容器标识
通过 docker ps 查看正在进行的容器的信息
[root@host1 ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
65a371a8cacb httpd "httpd-foreground" About a minute ago Up About a minute 0.0.0.0:80->80/tcp, [::]:80->80/tcp testweb
通过 docker logs 命令来获取容器的日志信息
[root@host1 ~]# docker logs testweb
AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using 172.17.0.2. Set the 'ServerName' directive globally to suppress this message
AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using 172.17.0.2. Set the 'ServerName' directive globally to suppress this message
[Wed Sep 10 03:36:14.497106 2025] [mpm_event:notice] [pid 1:tid 1] AH00489: Apache/2.4.65 (Unix) configured -- resuming normal operations
[Wed Sep 10 03:36:14.497185 2025] [core:notice] [pid 1:tid 1] AH00094: Command line: 'httpd -D FOREGROUND'
3.掌握容器的其他常用操作
1.创建容器
[root@host1 ~]# docker create -i -t busybox
Unable to find image 'busybox:latest' locally
latest: Pulling from library/busybox
80bfbb8a41a2: Pull complete
Digest: sha256:ab33eacc8251e3807b85bb6dba570e4698c3998eca6f0fc2ccb60575a563ea74
Status: Downloaded newer image for busybox:latest
c8efe28b118e9e11920b797ae085d7e31babed65c7116a54ee77722bdef5e4db #返回容器 ID
2.启动容器
[root@host1 ~]# docker start c8efe2 #c8efe2 为容器 ID 前六位
c8efe2
3.停止容器
[root@host1 ~]# docker stop c8efe2
c8efe2
4.重命名容器
[root@host1 ~]# docker run -d httpd
d3ff35d7b487c64e38395000bc18be0e89d62238c1f04140b4ffebd77209a2af
[root@host1 ~]# docker rename d3ff35 myweb
[root@host1 ~]# docker ps -l
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
d3ff35d7b487 httpd "httpd-foreground" 55 seconds ago Up 54 seconds 80/tcp myweb
5.显示容器列表
列出所有容器
[root@host1 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
d3ff35d7b487 httpd "httpd-foreground" 2 minutes ago Up 2 minutes 80/tcp myweb
c8efe28b118e busybox "sh" 8 minutes ago Exited (137) 4 minutes ago stoic_raman
65a371a8cacb httpd "httpd-foreground" 17 minutes ago Up 17 minutes 0.0.0.0:80->80/tcp, [::]:80->80/tcp testweb
7ab5ac9bc007 ubuntu "/bin/bash" 25 minutes ago Exited (0) 25 minutes ago inspiring_joliot
b97f426e8369 ubuntu "/bin/echo" 25 minutes ago Exited (0) 25 minutes ago friendly_chaplygin
9ac8245b5b08 img-layers-test "python /app/app.py" 45 hours ago Exited (0) 45 hours ago crazy_kowalevski
49e91767b48d ubuntu "/bin/bash" 2 days ago Exited (0) 2 days ago frosty_lichterman
38b001022f7a hello-world "/hello" 2 days ago Exited (0) 2 days ago intelligent_brahmagupta
列出已停止的容器
[root@host1 ~]# docker ps --filter status=exited
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
c8efe28b118e busybox "sh" 9 minutes ago Exited (137) 6 minutes ago stoic_raman
7ab5ac9bc007 ubuntu "/bin/bash" 26 minutes ago Exited (0) 26 minutes ago inspiring_joliot
b97f426e8369 ubuntu "/bin/echo" 27 minutes ago Exited (0) 27 minutes ago friendly_chaplygin
9ac8245b5b08 img-layers-test "python /app/app.py" 45 hours ago Exited (0) 45 hours ago crazy_kowalevski
49e91767b48d ubuntu "/bin/bash" 2 days ago Exited (0) 2 days ago frosty_lichterman
38b001022f7a hello-world "/hello" 2 days ago Exited (0) 2 days ago intelligent_brahmagupta
由 docker ps 命令获取符合条件的容器（暂停正在运行的所有容器）
[root@host1 ~]# docker pause $(docker ps -f status=running -q)
d3ff35d7b487
65a371a8cacb
6.查看容器的详细信息
获取指定 ID 的容器名称
[root@host1 ~]# docker inspect --format='{{.Name}}' d3ff35d7b487
/myweb
通过 JSON 格式的 State 子节点获取容器的状态元数据
[root@host1 ~]# docker inspect --format='{{json .State }}' myweb
{"Status":"paused","Running":true,"Paused":true,"Restarting":false,"OOMKilled":false,"Dead":false,"Pid":263525,"ExitCode":0,"Error":"","StartedAt":"2025-09-10T03:51:28.991192754Z","FinishedAt":"0001-01-01T00:00:00Z"}
7.进入容器
（1）使用 docker attach 命令连接到正在进行的容器
[root@host1 ~]# docker run -d --name topdemo ubuntu /usr/bin/top -b
a3cb60a0093c4ded26fea5004383b4af8505aa524fb2d5da0d5aa8f4e6f9062a
[root@host1 ~]# docker attach topdemo
top - 04:09:08 up 48 min, 0 user, load average: 0.25, 0.66, 0.52
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.4 us, 1.4 sy, 0.0 ni, 98.0 id, 0.0 wa, 0.1 hi, 0.1 si, 0.0 st
MiB Mem : 7648.8 total, 5884.7 free, 1071.8 used, 965.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6577.1 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5164 3104 R 0.0 0.1 0:00.02 top
top - 04:09:11 up 48 min, 0 user, load average: 0.25, 0.66, 0.52
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.2 us, 0.7 sy, 0.0 ni, 99.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7648.8 total, 5887.3 free, 1069.2 used, 965.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6579.6 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5164 3104 R 0.0 0.1 0:00.02 top
top - 04:09:14 up 48 min, 0 user, load average: 0.23, 0.65, 0.51
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.5 us, 1.3 sy, 0.0 ni, 98.0 id, 0.0 wa, 0.1 hi, 0.1 si, 0.0 st
MiB Mem : 7648.8 total, 5888.7 free, 1067.7 used, 965.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6581.1 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5164 3104 R 0.3 0.1 0:00.03 top
top - 04:09:17 up 48 min, 0 user, load average: 0.21, 0.64, 0.51
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.4 us, 1.3 sy, 0.0 ni, 98.2 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7648.8 total, 5887.6 free, 1068.9 used, 965.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6579.9 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5164 3104 R 0.0 0.1 0:00.03 top
top - 04:09:20 up 48 min, 0 user, load average: 0.21, 0.64, 0.51
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.5 us, 1.3 sy, 0.0 ni, 98.1 id, 0.0 wa, 0.1 hi, 0.1 si, 0.0 st
MiB Mem : 7648.8 total, 5888.8 free, 1067.6 used, 965.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6581.2 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5164 3104 R 0.0 0.1 0:00.03 top
top - 04:09:23 up 49 min, 0 user, load average: 0.19, 0.62, 0.51
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.2 us, 0.7 sy, 0.0 ni, 99.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7648.8 total, 5887.7 free, 1068.8 used, 965.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6580.0 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5164 3104 R 0.0 0.1 0:00.03 top^C
[root@host1 ~]# docker ps -a | grep topdemo
a3cb60a0093c ubuntu "/usr/bin/top -b" About a minute ago Exited (0) 28 seconds ag
o topdemo
在执行 docker attach 命令连接容器时加上 --sig-proxy=false 选项，确保按 Ctrl + C 组合键不会停止容器
[root@host1 ~]# docker attach --sig-proxy=false topdemo
You cannot attach to a stopped container, start it first
[root@host1 ~]# docker ps -a | grep topdemo
a3cb60a0093c ubuntu "/usr/bin/top -b" 6 minutes ago Exited (0) 5 minutes ago
topdemo
[root@host1 ~]# docker start topdemo
topdemo
[root@host1 ~]# docker attach --sig-proxy=false topdemo
top - 04:16:09 up 55 min, 0 user, load average: 0.00, 0.15, 0.31
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.3 us, 1.3 sy, 0.0 ni, 98.2 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7648.8 total, 5882.9 free, 1072.7 used, 966.0 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6576.1 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.01 top
top - 04:16:12 up 55 min, 0 user, load average: 0.00, 0.15, 0.31
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.3 us, 1.4 sy, 0.0 ni, 98.1 id, 0.0 wa, 0.0 hi, 0.1 si, 0.0 st
MiB Mem : 7648.8 total, 5879.4 free, 1076.2 used, 966.0 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6572.6 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.01 top
top - 04:16:15 up 55 min, 0 user, load average: 0.00, 0.15, 0.31
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.2 us, 0.6 sy, 0.0 ni, 99.2 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7648.8 total, 5880.6 free, 1075.1 used, 966.0 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6573.7 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.01 top
top - 04:16:18 up 55 min, 0 user, load average: 0.00, 0.14, 0.31
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.4 us, 1.5 sy, 0.0 ni, 98.0 id, 0.0 wa, 0.1 hi, 0.1 si, 0.0 st
MiB Mem : 7648.8 total, 5880.7 free, 1074.9 used, 966.0 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6573.9 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.01 top
top - 04:16:21 up 56 min, 0 user, load average: 0.00, 0.14, 0.31
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.3 us, 1.3 sy, 0.0 ni, 98.4 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7648.8 total, 5880.0 free, 1075.6 used, 966.0 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6573.2 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.3 0.1 0:00.02 top^C
top - 04:16:24 up 56 min, 0 user, load average: 0.00, 0.14, 0.31
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.3 us, 1.5 sy, 0.0 ni, 98.0 id, 0.0 wa, 0.1 hi, 0.1 si, 0.0 st
MiB Mem : 7648.8 total, 5883.4 free, 1072.2 used, 966.0 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6576.6 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.02 top
top - 04:16:27 up 56 min, 0 user, load average: 0.00, 0.14, 0.30
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.2 us, 0.6 sy, 0.0 ni, 99.1 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7648.8 total, 5885.1 free, 1070.5 used, 966.0 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6578.3 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.02 top
top - 04:16:30 up 56 min, 0 user, load average: 0.00, 0.14, 0.30
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.5 us, 1.5 sy, 0.0 ni, 98.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7648.8 total, 5888.7 free, 1066.9 used, 966.0 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6581.9 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.02 top
top - 04:16:33 up 56 min, 0 user, load average: 0.00, 0.14, 0.30
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.4 us, 1.3 sy, 0.0 ni, 98.2 id, 0.0 wa, 0.1 hi, 0.1 si, 0.0 st
MiB Mem : 7648.8 total, 5887.0 free, 1068.6 used, 966.0 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6580.2 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.02 top
top - 04:16:36 up 56 min, 0 user, load average: 0.00, 0.14, 0.30
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.4 us, 1.3 sy, 0.0 ni, 98.2 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7648.8 total, 5885.4 free, 1070.2 used, 966.0 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6578.6 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.02 top
top - 04:16:39 up 56 min, 0 user, load average: 0.00, 0.13, 0.30
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.2 us, 0.6 sy, 0.0 ni, 99.1 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7648.8 total, 5889.4 free, 1066.1 used, 966.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6582.7 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.02 top
top - 04:16:42 up 56 min, 0 user, load average: 0.00, 0.13, 0.30
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.6 us, 1.4 sy, 0.0 ni, 97.9 id, 0.0 wa, 0.1 hi, 0.1 si, 0.0 st
MiB Mem : 7648.8 total, 5888.5 free, 1067.1 used, 966.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6581.7 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.02 top
top - 04:16:45 up 56 min, 0 user, load average: 0.00, 0.13, 0.30
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.4 us, 1.3 sy, 0.0 ni, 98.2 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7648.8 total, 5887.6 free, 1067.9 used, 966.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6580.9 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.02 top^C
top - 04:16:48 up 56 min, 0 user, load average: 0.00, 0.13, 0.30
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.5 us, 1.4 sy, 0.0 ni, 98.0 id, 0.0 wa, 0.1 hi, 0.1 si, 0.0 st
MiB Mem : 7648.8 total, 5885.8 free, 1069.7 used, 966.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6579.1 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.02 top
top - 04:16:51 up 56 min, 0 user, load average: 0.00, 0.13, 0.30
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.2 us, 0.6 sy, 0.0 ni, 99.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7648.8 total, 5885.4 free, 1070.1 used, 966.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6578.7 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.02 top
top - 04:16:54 up 56 min, 0 user, load average: 0.00, 0.13, 0.29
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.4 us, 1.5 sy, 0.0 ni, 97.9 id, 0.0 wa, 0.1 hi, 0.1 si, 0.0 st
MiB Mem : 7648.8 total, 5888.1 free, 1067.4 used, 966.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6581.4 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.02 top^[
top - 04:16:57 up 56 min, 0 user, load average: 0.00, 0.12, 0.29
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.5 us, 1.2 sy, 0.0 ni, 98.2 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7648.8 total, 5882.4 free, 1073.1 used, 966.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6575.7 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.02 top
top - 04:17:00 up 56 min, 0 user, load average: 0.00, 0.12, 0.29
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.5 us, 1.3 sy, 0.0 ni, 98.0 id, 0.0 wa, 0.1 hi, 0.1 si, 0.0 st
MiB Mem : 7648.8 total, 5877.8 free, 1077.7 used, 966.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6571.1 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.02 top
top - 04:17:03 up 56 min, 0 user, load average: 0.00, 0.12, 0.29
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.2 us, 0.6 sy, 0.0 ni, 99.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7648.8 total, 5880.8 free, 1074.7 used, 966.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6574.1 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.02 top
top - 04:17:06 up 56 min, 0 user, load average: 0.00, 0.12, 0.29
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.5 us, 1.5 sy, 0.0 ni, 97.9 id, 0.0 wa, 0.1 hi, 0.1 si, 0.0 st
MiB Mem : 7648.8 total, 5882.1 free, 1073.4 used, 966.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6575.4 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.02 top
top - 04:17:09 up 56 min, 0 user, load average: 0.00, 0.12, 0.29
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.5 us, 1.2 sy, 0.0 ni, 98.2 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7648.8 total, 5880.4 free, 1075.1 used, 966.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6573.7 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.02 top
top - 04:17:12 up 56 min, 0 user, load average: 0.00, 0.12, 0.29
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.5 us, 1.3 sy, 0.0 ni, 98.0 id, 0.0 wa, 0.1 hi, 0.1 si, 0.0 st
MiB Mem : 7648.8 total, 5883.6 free, 1071.9 used, 966.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6576.9 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.3 0.1 0:00.03 top
top - 04:17:15 up 56 min, 0 user, load average: 0.00, 0.12, 0.29
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.3 us, 0.7 sy, 0.0 ni, 99.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7648.8 total, 5885.7 free, 1069.8 used, 966.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6579.0 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.03 top
top - 04:17:18 up 56 min, 0 user, load average: 0.00, 0.12, 0.29
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.4 us, 1.3 sy, 0.0 ni, 98.1 id, 0.0 wa, 0.1 hi, 0.1 si, 0.0 st
MiB Mem : 7648.8 total, 5887.5 free, 1067.9 used, 966.2 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6580.9 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.03 top
top - 04:17:21 up 57 min, 0 user, load average: 0.00, 0.12, 0.29
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.5 us, 1.2 sy, 0.0 ni, 98.2 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7648.8 total, 5886.6 free, 1068.9 used, 966.2 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6579.9 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.03 top
top - 04:17:24 up 57 min, 0 user, load average: 0.00, 0.11, 0.28
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.4 us, 1.3 sy, 0.0 ni, 98.1 id, 0.0 wa, 0.1 hi, 0.1 si, 0.0 st
MiB Mem : 7648.8 total, 5884.3 free, 1071.2 used, 966.2 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6577.6 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.03 top
top - 04:17:27 up 57 min, 0 user, load average: 0.00, 0.11, 0.28
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.3 us, 0.6 sy, 0.0 ni, 99.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7648.8 total, 5883.2 free, 1072.2 used, 966.2 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6576.6 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.03 top
top - 04:17:30 up 57 min, 0 user, load average: 0.00, 0.11, 0.28
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.5 us, 1.5 sy, 0.0 ni, 97.9 id, 0.0 wa, 0.1 hi, 0.1 si, 0.0 st
MiB Mem : 7648.8 total, 5880.8 free, 1074.6 used, 966.2 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6574.2 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.03 top
top - 04:17:33 up 57 min, 0 user, load average: 0.00, 0.11, 0.28
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.5 us, 1.2 sy, 0.0 ni, 98.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 7648.8 total, 5881.7 free, 1073.8 used, 966.2 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6575.0 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.03 top
top - 04:17:36 up 57 min, 0 user, load average: 0.00, 0.11, 0.28
Tasks: 1 total, 1 running, 0 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.5 us, 1.3 sy, 0.0 ni, 98.0 id, 0.0 wa, 0.1 hi, 0.1 si, 0.0 st
MiB Mem : 7648.8 total, 5874.6 free, 1080.8 used, 966.2 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 6568.0 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 8716 5280 3224 R 0.0 0.1 0:00.03 top^Z
[1]+ 已停止 docker attach --sig-proxy=false topdemo
（2）使用 docker exec 命令在正在运行的容器上执行命令
[root@host1 ~]# docker start topdemo
topdemo
[root@host1 ~]# docker exec -it topdemo /bin/bash
root@a3cb60a0093c:/# ps
PID TTY TIME CMD
7 pts/0 00:00:00 bash
15 pts/0 00:00:00 ps
root@a3cb60a0093c:/# exit
exit
[root@host1 ~]# docker ps | grep topdemo
a3cb60a0093c ubuntu "/usr/bin/top -b" 13 minutes ago Up 6 minutes
topdemo
8.删除容器
[root@host1 ~]# docker rm -f topdemo
topdemo
[root@host1 ~]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
d3ff35d7b487 httpd "httpd-foreground" 35 minutes ago Up 35 minutes (Paused) 80/tcp myweb
c8efe28b118e busybox "sh" 42 minutes ago Exited (137) 38 minutes ago stoic_raman
65a371a8cacb httpd "httpd-foreground" 51 minutes ago Up 51 minutes (Paused) 0.0.0.0:80->80/tcp, [::]:80->80/tcp testweb
7ab5ac9bc007 ubuntu "/bin/bash" 59 minutes ago Exited (0) 58 minutes ago inspiring_joliot
b97f426e8369 ubuntu "/bin/echo" 59 minutes ago Exited (0) 59 minutes ago friendly_chaplygin
9ac8245b5b08 img-layers-test "python /app/app.py" 46 hours ago Exited (0) 46 hours ago crazy_kowalevski
49e91767b48d ubuntu "/bin/bash" 2 days ago Exited (0) 2 days ago frosty_lichterman
38b001022f7a hello-world "/hello" 2 days ago Exited (0) 2 days ago intelligent_brahmagupta
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