Fix mkcd alias, add some shellfunctions

cd is a built-in shell command that changes the internal shell state
via the chdir() syscall. This cannot be called from a script.

.local/bin/aliases

@@ -34,10 +34,6 @@ java_run () {
 	java -cp './out' "$1"
 }
 
-mkcd() {
-    mkdir -p "$1" && cd "$1" || exit
-}
-
 # Search for packages, by name only
 pacman_search() {
 	pacman -Ss "$1" --color=always | \
@@ -90,6 +86,16 @@ screencast() {
 	fi
 }
 
+sha384sum() {
+	tmpfile=$(mktemp)
+	curl -o "$tmpfile" "$1" && openssl dgst -sha384 -binary "$tmpfile" | openssl base64 -A
+	rm -f "$tmpfile"
+}
+
+shuffle() {
+	echo "$1" | fold -w 1 | shuf | tr -d '\n'
+}
+
 stream() {
 	QUALITY=${2:-"720p"}