anchor.diff:  
   ## Examples
   
  +To start an interactive debugging session in a particular alloc, invoke exec
  +command with your desired shell available inside the task:
  +
   ```
  -$ # interactive debugging
  -$ nomad alloc exec eb17e557 /bin/sh
  -/ # ps -ef
  -...
  +$ nomad alloc exec eb17e557 /bin/bash
  +root@eb17e557:/data# # now run any debugging commands inside container
  +root@eb17e557:/data# # ps -ef
  +```
   
  +To run a command and stream results without starting an interactive shell, you
  +can pass the command and its arguments to exec directly:
  +
  +```
   $ # run commands without starting an interactive session
   $ nomad alloc exec eb17e557 cat /etc/resolv.conf
  -...
  +```
   
  -$ # run commands on an arbitrary alloc of a job
  -$ nomad alloc exec -job example printenv NOMAD_CPU_LIMIT
  -...
  +When passing command arguments to be evaluated in task, you may need to ensure
  +that your host shell doesn't interpolate values before invoking `exec` command.
  +For example, the following command would return the environment variable on
  +operator shell rather than task containers:
  +
   ```
  +$ nomad alloc exec eb17e557 echo $NOMAD_ALLOC_ID # wrong
  +```
  +
  +Here, we must start a shell in task to interpolate `$NOMAD_ALLOC_ID`, and quote
  +command or use the [heredoc syntax][heredoc]
  +
  +```
  +$ # by quoting argument
  +$ nomad alloc exec eb17e557 /bin/sh -c 'echo $NOMAD_ALLOC_ID'
  +eb17e557-443e-4c51-c049-5bba7a9850bc
  +
  +$ # by using heredoc and passing command in stdin
  +$ nomad alloc exec eb17e557 /bin/sh <<'EOF'
  +> echo $NOMAD_ALLOC_ID
  +> EOF
  +eb17e557-443e-4c51-c049-5bba7a9850bc
  +```
  +
  +This technique applies when aiming to run a shell pipeline without streaming
  +intermediate command output across the network:
  +
  +```
  +$ # e.g. find top appearing lines in some output
  +$ nomad alloc exec eb17e557 /bin/sh -c 'cat /output | sort | uniq -c | sort -rn | head -n 5'
  +```
  +
  +[heredoc]: http://tldp.org/LDP/abs/html/here-docs.html
   
   ## Using Job ID instead of Allocation ID
   
  
positive.code: 
  ```
  nomad alloc exec [options] <allocation> <command> [<args>...]
      ```
  
  
  The nomad exec command can be use to run commands inside a running task/allocation.
  
negative.code: page_title: "Commands: alloc exec"
  sidebar_current: "docs-commands-alloc-exec"
  description: >
    Runs a command in a container.
  ---
  
  # Command: alloc exec
  