diff --git a/active_hours.sh b/active_hours.sh
index 3f1785a..66e9e8a 100755
--- a/active_hours.sh
+++ b/active_hours.sh
@@ -1,3 +1,4 @@
+#!/usr/bin/env bash
 git log --author="Morgan" \
         --format="%ad" \
         --date="format:%H" |\
diff --git a/count_commits.sh b/count_commits.sh
index 685c0ac..cb3b615 100755
--- a/count_commits.sh
+++ b/count_commits.sh
@@ -1,2 +1,2 @@
-#/usr/bin/env bash
+#!/usr/bin/env bash
 git rev-list HEAD --count
diff --git a/count_links.sh b/count_links.sh
index 2f7cc81..202d67c 100755
--- a/count_links.sh
+++ b/count_links.sh
@@ -1,3 +1,3 @@
-#/usr/bin/env bash
+#!/usr/bin/env bash
 BASEDIR=$(dirname "$0")
-cat "$BASEDIR/README.md" | cut -d'(' -f2 | cut -d')' -f1 | egrep "^http*" | sort -u | wc -l | tr -d ' '
+cut -d'(' -f2 "$BASEDIR/README.md" | cut -d')' -f1 | grep -E "^http*" | sort -u | wc -l | tr -d ' '
diff --git a/top_domains.sh b/top_domains.sh
index 91ed15d..4d51539 100755
--- a/top_domains.sh
+++ b/top_domains.sh
@@ -1,3 +1,3 @@
-#/usr/bin/env bash
+#!/usr/bin/env bash
 BASEDIR=$(dirname "$0")
-cat "$BASEDIR/README.md" | cut -d'(' -f2 | cut -d')' -f1 | egrep "^http*" | awk -F/ '{print $3}' | sort  | uniq -c | sort -n
+cut -d'(' -f2 "$BASEDIR/README.md" | cut -d')' -f1 | grep -E "^http*" | awk -F/ '{print $3}' | sort  | uniq -c | sort -n
diff --git a/top_extensions.sh b/top_extensions.sh
index d97c2c0..ca7df8c 100755
--- a/top_extensions.sh
+++ b/top_extensions.sh
@@ -1,3 +1,3 @@
-#/usr/bin/env bash
+#!/usr/bin/env bash
 BASEDIR=$(dirname "$0")
-cat "$BASEDIR/README.md" | cut -d'(' -f2 | cut -d')' -f1 | egrep "^http*" | awk -F/ '{print $3}' | sed -E -e 's_.*\.([^\.]+)$_\1_g' | sort  | uniq -c | sort -n
+cut -d'(' -f2 "$BASEDIR/README.md" | cut -d')' -f1 | grep -E "^http*" | awk -F/ '{print $3}' | sed -E -e "s_.*\.([^\.]+)\$_\1_g" | sort  | uniq -c | sort -n