diff --git a/.local/bin/pub b/.local/bin/pub
index 5e409a5..ee685ae 100755
--- a/.local/bin/pub
+++ b/.local/bin/pub
@@ -5,6 +5,10 @@ err () {
 	printf '\033[31m%s\033[m\n' "$*" >&2
 }
 
+# TODO: Fallbacks with wget, nc, bash
+command -v curl >/dev/null 2>&1 || { echo "Need curl"; exit 1; }
+command -v timeout >/dev/null 2>&1 || { echo "Need timeout(1)"; exit 1; }
+
 curl () {
 	output=$(timeout 5 curl -sfSL "$@") # strip trailing newline
 	err=$? # save exit status
@@ -23,7 +27,10 @@ file=$(mktemp --tmpdir pubtmpXXXXXXXXXXXXXXX) # must not contain dot .
 if [ -z "$1" ]; then
 	cat >"$file" # `pub` or `<file pub` or `echo bla | pub`
 else
-	cp "$1" "$file" # `pub FILE`
+	if ! cp "$1" "$file"; then # `pub FILE`
+		err "cp failed!"
+		exit 2
+	fi
 fi
 
 ######################## PASTEBINS ####################
diff --git a/.local/bin/qr b/.local/bin/qr
index 5b2ef0a..b21b44f 100755
--- a/.local/bin/qr
+++ b/.local/bin/qr
@@ -1,5 +1,7 @@
 #! /bin/sh -
 
+command -v qrencode >/dev/null 2>&1 || { echo "Need qrencode"; exit 1; }
+
 [ -t 1 ] &&
 exec qrencode -m2 -t ANSI256UTF8 "$@" ||
 exec qrencode -m2 -t UTF8 "$@"
diff --git a/.local/bin/torshare b/.local/bin/torshare
index 297bf07..f1c2bfa 100755
--- a/.local/bin/torshare
+++ b/.local/bin/torshare
@@ -3,6 +3,13 @@
 [ ! $# = 1 ] && { echo "Usage: torshare REGULAR_FILE"; exit 1; }
 target_file="$1"
 
+command -v curl >/dev/null 2>&1 || { echo "Need curl"; exit 2; }
+command -v instant_tor >/dev/null 2>&1 || { echo "Need instant_tor"; exit 2; }
+command -v pub >/dev/null 2>&1 || { echo "Need pub"; exit 2; }
+command -v qr >/dev/null 2>&1 || { echo "Need qr"; exit 2; }
+command -v python3 >/dev/null 2>&1 || { echo "Need python3"; exit 2; }
+command -v readlink >/dev/null 2>&1 || { echo "Need readlink"; exit 2; }
+
 urlencode () {
 	str="$*"
 	encoded=
@@ -20,14 +27,18 @@ urlencode () {
 	printf %s "$encoded"
 }
 
-tor_host="$(instant_tor --daemonize)"
+tor_host="$(instant_tor --daemonize)" || { echo "Failed to start tor proxy"; exit 3; }
 ln -sf "$(readlink -f -- "$target_file")" "/tmp/.tmptor/html/$(basename -- "$target_file")"
 
 link="$(pub << GET_FILE_VIA_TOR
 #! /bin/sh -
 
 if [ ! -f ./instant_tor ] || ! command -v instant_tor > /dev/null 2>&1; then
-	wget -q https://timo.one/get_instant_tor/instant_tor || { echo "Failed to download instant_tor"; exit 1; }
+	wget -qO instant_tor https://timo.one/get_instant_tor/instant_tor || {
+			curl -sfkSL -o instant_tor https://timo.one/get_instant_tor/instant_tor || {
+				echo "Failed to download instant_tor"; exit 1;
+			}
+		}
 fi
 if [ ! -f ./instant_tor ]; then
 	if ! command -v instant_tor > /dev/null 2>&1; then
@@ -38,7 +49,7 @@ if [ ! -f ./instant_tor ]; then
 fi
 chmod +x ./instant_tor
 ./instant_tor --daemonize || { printf '\033[42;30m%s\033[m\n' "Some error occured while starting tor proxy, trying to download anyways"; }
-curl -O --proxy socks5h://127.0.0.1:9050 "$tor_host/$(urlencode "$target_file")" || { echo "Some error occured downloading file"; exit 4; }
+curl -O --proxy socks5h://127.0.0.1:9050 "$tor_host/$(urlencode "$target_file")" || { echo "Some error occured downloading file"; exit 3; }
 echo "Successfully downloaded $target_file, size \$(wc -c < ./$(squote_escape "$target_file")) bytes."
 GET_FILE_VIA_TOR
 )"