change PID/GID

Ray Stell <ray.stell@xxxxxxxxx> · Fri, 9 Dec 2016 10:20:09 -0500



    Due to some external, sysadmin issues, I'm forced to change the
      pid/gid of the postresql user on CentOS6.  I'm wondering if this
      plan of action has any flaws.  It seemed to work in a test
      environment to shutdown and change the pid/gid via:
    

          find / -uid 1500 -exec chown -h
        2500:2500 {} \;        (as root,
        of course)
    

    Startup went ok, but I've not done this in production and find
      myself a little nervous.  I'll test in a hotstandby config here in
      a moment.  Any gotchas hiding in there?  

    
    BTW, -h will change symlinks, which I found handy. 

    
        -h, --no-dereference

                    affect each symbolic link instead of any referenced
      file (useful only on systems that can change the ownership of a
      symlink)