diff --git a/lgsm/modules/check_glibc.sh b/lgsm/modules/check_glibc.sh
index 8b3d00658..e49b461f6 100644
--- a/lgsm/modules/check_glibc.sh
+++ b/lgsm/modules/check_glibc.sh
@@ -17,7 +17,7 @@ elif [ -z "${glibc}" ]; then
 	fn_print_error_nl "Checking glibc: requirement unknown"
 	fn_script_log_error "Checking glibc: requirement unknown"
 	fn_sleep_time_5
-elif [ "$(printf '%s\n'${glibc}'\n' "${glibcversion}" | sort -V | head -n 1)" != "${glibc}" ]; then
+elif [ "$(printf '%s\n' "${glibc}" "${glibcversion}" | sort -V | head -n 1)" != "${glibc}" ]; then
 	fn_print_dots "Checking glibc"
 	fn_print_error_nl "Checking glibc: requirements not met"
 	fn_script_log_error "Checking glibc: requirements not met"
diff --git a/lgsm/modules/command_debug.sh b/lgsm/modules/command_debug.sh
index a5dae7615..e502605f2 100644
--- a/lgsm/modules/command_debug.sh
+++ b/lgsm/modules/command_debug.sh
@@ -49,7 +49,7 @@ if [ -n "${glibc}" ]; then
 		:
 	elif [ -z "${glibc}" ]; then
 		echo -e "${lightblue}glibc required:\t${red}UNKNOWN${default}"
-	elif [ "$(printf '%s\n'${glibc}'\n' ${glibcversion} | sort -V | head -n 1)" != "${glibc}" ]; then
+	elif [ "$(printf '%s\n' "${glibc}" "${glibcversion}" | sort -V | head -n 1)" != "${glibc}" ]; then
 		echo -e "${lightblue}glibc required:\t${red}${glibc} ${default}(${red}distro glibc ${glibcversion} too old${default})"
 	else
 		echo -e "${lightblue}glibc required:\t${green}${glibc}${default}"
diff --git a/lgsm/modules/command_dev_query_raw.sh b/lgsm/modules/command_dev_query_raw.sh
index b95ef6c33..61b4d7a70 100644
--- a/lgsm/modules/command_dev_query_raw.sh
+++ b/lgsm/modules/command_dev_query_raw.sh
@@ -249,9 +249,9 @@ echo -e "${bold}${lightyellow}Query Port (${queryport}) - TCP Output${default}"
 fn_messages_separator
 echo -e ""
 for queryip in "${queryips[@]}"; do
-	echo -e "${italic}bash -c 'exec 3<> /dev/tcp/'${queryip}'/'${queryport}''${default}"
+	echo -e "${italic}bash -c 'exec 3<> /dev/tcp/'\"${queryip}\"'/'\"${queryport}\"''${default}"
 	echo -e ""
-	timeout 3 bash -c 'exec 3<> /dev/tcp/'${queryip}'/'${queryport}''
+	timeout 3 bash -c 'exec 3<> /dev/tcp/'"${queryip}"'/'"${queryport}"''
 	querystatus="$?"
 	echo -e ""
 	if [ "${querystatus}" == "0" ]; then
@@ -268,9 +268,9 @@ echo -e "${lightgreen}TCP Raw Output${default}"
 fn_messages_separator
 echo -e ""
 for queryip in "${queryips[@]}"; do
-	echo -e "${italic}bash -c 'exec 3<> /dev/tcp/'${queryip}'/'${port}''${default}"
+	echo -e "${italic}bash -c 'exec 3<> /dev/tcp/'\"${queryip}\"'/'\"${port}\"''${default}"
 	echo -e ""
-	timeout 3 bash -c 'exec 3<> /dev/tcp/'${queryip}'/'${port}''
+	timeout 3 bash -c 'exec 3<> /dev/tcp/'"${queryip}"'/'"${port}"''
 	querystatus="$?"
 	echo -e ""
 	if [ "${querystatus}" == "0" ]; then
diff --git a/lgsm/modules/command_mods_install.sh b/lgsm/modules/command_mods_install.sh
index e76f3f1fa..a8f90293b 100644
--- a/lgsm/modules/command_mods_install.sh
+++ b/lgsm/modules/command_mods_install.sh
@@ -47,7 +47,7 @@ while [ "${compatiblemodslistindex}" -lt "${#compatiblemodslist[@]}" ]; do
 	echo -e "${displayedmodname} - ${displayedmoddescription} - ${displayedmodsite}"
 	echo -e " * ${cyan}${displayedmodcommand}${default}"
 	# Increment index from the amount of values we just displayed.
-	let "compatiblemodslistindex+=4"
+	((compatiblemodslistindex += 4))
 	((totalmodsavailable++))
 done
 
@@ -61,16 +61,29 @@ fn_script_log_info "${totalmodsavailable} addons/mods are available for install"
 
 ## User selects a mod.
 echo -e ""
-while [[ ! " ${availablemodscommands[@]} " =~ " ${usermodselect} " ]]; do
+
+while :; do
 	echo -en "Enter an ${cyan}addon/mod${default} to ${green}install${default} (or exit to abort): "
 	read -r usermodselect
 	# Exit if user says exit or abort.
 	if [ "${usermodselect}" == "exit" ] || [ "${usermodselect}" == "abort" ]; then
 		core_exit.sh
-	# Supplementary output upon invalid user input.
-	elif [[ ! " ${availablemodscommands[@]} " =~ " ${usermodselect} " ]]; then
-		fn_print_error2_nl "${usermodselect} is not a valid addon/mod."
 	fi
+
+	validselection=0
+	for availablemodcommand in "${availablemodscommands[@]}"; do
+		if [ "${availablemodcommand}" == "${usermodselect}" ]; then
+			validselection=1
+			break
+		fi
+	done
+
+	if [ "${validselection}" -eq 1 ]; then
+		break
+	fi
+
+	# Supplementary output upon invalid user input.
+	fn_print_error2_nl "${usermodselect} is not a valid addon/mod."
 done
 # Get mod info.
 currentmod="${usermodselect}"
diff --git a/lgsm/modules/command_mods_remove.sh b/lgsm/modules/command_mods_remove.sh
index 589046b11..04240eb60 100644
--- a/lgsm/modules/command_mods_remove.sh
+++ b/lgsm/modules/command_mods_remove.sh
@@ -32,16 +32,29 @@ done
 
 echo -e ""
 # Keep prompting as long as the user input doesn't correspond to an available mod.
-while [[ ! " ${installedmodslist[@]} " =~ " ${usermodselect} " ]]; do
+
+while :; do
 	echo -en "Enter an ${cyan}addon/mod${default} to ${red}remove${default} (or exit to abort): "
 	read -r usermodselect
 	# Exit if user says exit or abort.
 	if [ "${usermodselect}" == "exit" ] || [ "${usermodselect}" == "abort" ]; then
 		core_exit.sh
-	# Supplementary output upon invalid user input.
-	elif [[ ! " ${availablemodscommands[@]} " =~ " ${usermodselect} " ]]; then
-		fn_print_error2_nl "${usermodselect} is not a valid addon/mod."
 	fi
+
+	validselection=0
+	for installedmodcommand in "${installedmodslist[@]}"; do
+		if [ "${installedmodcommand}" == "${usermodselect}" ]; then
+			validselection=1
+			break
+		fi
+	done
+
+	if [ "${validselection}" -eq 1 ]; then
+		break
+	fi
+
+	# Supplementary output upon invalid user input.
+	fn_print_error2_nl "${usermodselect} is not a valid addon/mod."
 done
 
 fn_print_warning_nl "You are about to remove ${cyan}${usermodselect}${default}."