diff --git a/apt-dater-history-prune b/apt-dater-history-prune
index fb11bfc..74ffeca 100755
--- a/apt-dater-history-prune
+++ b/apt-dater-history-prune
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Prune old apt-dater history
 MTIME=+365
 
diff --git a/connections-without-ipv6-privacy b/connections-without-ipv6-privacy
index f77393d..f8242ba 100755
--- a/connections-without-ipv6-privacy
+++ b/connections-without-ipv6-privacy
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # list all redhat/networkmanager connections without ipv6 privacy
 set -e
 cd /etc/sysconfig/network-scripts
diff --git a/crontab-suggest b/crontab-suggest
index c45bf00..ca21666 100755
--- a/crontab-suggest
+++ b/crontab-suggest
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # suggest a random time for a cronjob
 
 set -u
diff --git a/dbus-discover b/dbus-discover
index 7e19bb2..b75d15d 100755
--- a/dbus-discover
+++ b/dbus-discover
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Discover DBUS session bus
 # Source: can't remember where this from...
 
diff --git a/dnf-leaves-grepped b/dnf-leaves-grepped
index e9de034..2ea2e83 100755
--- a/dnf-leaves-grepped
+++ b/dnf-leaves-grepped
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Poor boy's debfoster for dnf
 
 OK_LEAVES=(
diff --git a/gen-yum b/gen-yum
index 233c858..2fecb36 100755
--- a/gen-yum
+++ b/gen-yum
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Setup YUM/DNF repository
 
 GPG_KEY=F77BB18D
diff --git a/pdfjoin-aligned b/pdfjoin-aligned
index 752ca5d..f401074 100755
--- a/pdfjoin-aligned
+++ b/pdfjoin-aligned
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # join pdfs and insert an empty (one-page) pdf for pdfs with an odd page number
 
 # create an empty (one-page) pdf
diff --git a/pdfnup-slides b/pdfnup-slides
index 9c5e076..61a86b9 100755
--- a/pdfnup-slides
+++ b/pdfnup-slides
@@ -1,4 +1,5 @@
-#!/bin/bash
+#!/usr/bin/env bash
+# make a printable pdf for powerpoint slides, 2 slides on each page
 
 file=$1
 
diff --git a/randint b/randint
index ab95870..f6346ad 100755
--- a/randint
+++ b/randint
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Give a random integer between 1 and $1 inclusive
 
 min=1