ps command doesn t work in docker container

Question

I want to do a ps command in a docker container derived from Debian official Docker hub repository     docker run -ti debian wheezy  bin bash root 51afd6b09af8    ps bash  ps  command not found

User · Accepted Answer

ps is not installed in the base wheezy image  Try this from within the container   RUN apt-get update  amp  amp  apt-get install -y procps

User · Answer

If you re running a CentOS container  you can install ps using this command  yum install -y procps  Running this command on Dockerfile  RUN yum install -y procps

User · Answer

use docker top  docker top  lt container ID gt

User · Answer

In case you can t install the procps package  don t have proper permissions  you can use  proc directory   The first few directories  named as numbers  are PIDs of your processes  Inside directories  you can find additional information useful to decipher which process is connected to each PID  For example  you can use the cat command to view  cmdline  file to check which process is connected to PID     ls  proc 1 10 11        ls -1  proc 22 attr autogroup auxv cgroup clear refs cmdline        cat  proc 22 cmdline   bin sh

User · Answer

Firstly  run the command below   apt-get update  amp  amp  apt-get install procps   and then run   ps -ef

[debian] ps command doesn't work in docker container

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