diff --git a/daily-use-pcs/fedora/setup-git.bash b/daily-use-pcs/fedora/setup-git.bash
index 8a56103..425777d 100755
--- a/daily-use-pcs/fedora/setup-git.bash
+++ b/daily-use-pcs/fedora/setup-git.bash
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Exit if there's an error
 set -e
 # Modify constants as needed
diff --git a/random-bash.md b/random-bash.md
old mode 100644
new mode 100755
index ce4ea8a..344e402
--- a/random-bash.md
+++ b/random-bash.md
@@ -49,9 +49,18 @@ echo "Package manager: ${PM}"
 This exits with and error message if it's run as root.
 
 ```bash
-#!/bin/bash
+#!/usr/bin/env bash
 if [ $(whoami) != "root" ]; then
     >&2 echo Rerun as non-root user
     exit 1
 fi
+```
+
+## Output to stderr
+
+```bash
+#!/usr/bin/env bash
+# Put `>&2` at beginning or end of line to output to stderr
+>&2 echo "This goes to stderr"
+echo "This goes to stdout"
 ```
\ No newline at end of file
diff --git a/test.bash b/test.bash
index 46361b3..88aa31f 100755
--- a/test.bash
+++ b/test.bash
@@ -1,5 +1,5 @@
-#!/bin/bash
-command_exists() { type "$1" &> /dev/null; }
+#!/usr/bin/env bash
+type "$1" &> /dev/null; }
 
 if command_exists "apt-get"; then
     PM="apt-get"
diff --git a/zsh/zsh-setup.bash b/zsh/zsh-setup.bash
index e6f534b..66af0cb 100755
--- a/zsh/zsh-setup.bash
+++ b/zsh/zsh-setup.bash
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Exit if there's an error
 set -e
 declare -A osInfo;