diff --git a/README.md b/README.md
index e5c3056..1143163 100644
--- a/README.md
+++ b/README.md
@@ -523,6 +523,11 @@ time=YYYY-MM-DDTHH:MM:SS level=INFO msg="initialized db" path=/path/to/your/app/
 time=YYYY-MM-DDTHH:MM:SS level=INFO msg="replicating to" name=s3 type=s3 sync-interval=1s bucket=mybkt path="" region=us-east-1 endpoint=http://localhost:9000
 ```
 
+### Troubleshooting
+
+Some version of Linux don't install `ps`, you may need to install it in order to
+leverage the Rails engine.
+
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake test` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
diff --git a/lib/litestream.rb b/lib/litestream.rb
index 159faa9..6c4b7a0 100644
--- a/lib/litestream.rb
+++ b/lib/litestream.rb
@@ -164,7 +164,7 @@ def systemctl_info
     end
 
     def process_info
-      litestream_replicate_ps = `ps -ax | grep litestream | grep replicate`
+      litestream_replicate_ps = `ps -ef | grep litestream | grep replicate`
       exit_code = $?.exitstatus
       return unless exit_code.zero?
 
diff --git a/test/test_litestream.rb b/test/test_litestream.rb
index 5c1f41d..abb01c0 100644
--- a/test/test_litestream.rb
+++ b/test/test_litestream.rb
@@ -68,7 +68,7 @@ def test_replicate_process_ps
 
     stubbed_backticks = proc do |arg|
       case arg
-      when "ps -ax | grep litestream | grep replicate"
+      when "ps -ef | grep litestream | grep replicate"
         stubbed_ps_list
       when %(ps -o "state,lstart" 40364)
         stubbed_ps_status