From 44435b60f1196bb59d34bb4b52d57450ca6d8e1e Mon Sep 17 00:00:00 2001
From: mo khan <mo.khan@gmail.com>
Date: Tue, 1 Oct 2019 19:43:56 -0600
Subject: find duplicate uids

---
 README.md         | 7 +++++++
 bin/duplicate-ids | 3 +++
 2 files changed, 10 insertions(+)
 create mode 100755 bin/duplicate-ids

diff --git a/README.md b/README.md
index 4889909..8b9252d 100644
--- a/README.md
+++ b/README.md
@@ -1147,5 +1147,12 @@ Rootly Powers and Processes
   ```
 
   c. Find any sets of entries that have duplicate UIDs.
+
+  ```bash
+  #!/bin/bash
+
+  cat /etc/passwd | grep -v -E '^#' | awk -F: '{ print $3 }' | sort -n | uniq -d
+  ```
+
   d. Find entries that have duplicate login names.
   e. Find entries that have no expiration date (needs /etc/shadow).
diff --git a/bin/duplicate-ids b/bin/duplicate-ids
new file mode 100755
index 0000000..2d04668
--- /dev/null
+++ b/bin/duplicate-ids
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+cat /etc/passwd | grep -v -E '^#'  | awk -F: '{ print $3 }' | sort -n | uniq -d
-- 
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