diff --git a/virt-v2v/cold/scripts/rhel/run/network_config_util.sh b/virt-v2v/cold/scripts/rhel/run/network_config_util.sh
index 8b2c23310..4049cc725 100644
--- a/virt-v2v/cold/scripts/rhel/run/network_config_util.sh
+++ b/virt-v2v/cold/scripts/rhel/run/network_config_util.sh
@@ -28,16 +28,16 @@ log() {
 extract_mac_ip() {
     S_HW=""
     S_IP=""
-    if [[ "$1" =~ ^([0-9A-Fa-f]{2}:[0-9A-Fa-f]{2}:[0-9A-Fa-f]{2}:[0-9A-Fa-f]{2}:[0-9A-Fa-f]{2}:[0-9A-Fa-f]{2}):ip:([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}) ]]; then
-        S_HW="${BASH_REMATCH[1]}"
-        S_IP="${BASH_REMATCH[2]}"
+    if echo "$1" | grep -qE '^([0-9A-Fa-f]{2}(:[0-9A-Fa-f]{2}){5}):ip:([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})$'; then
+        S_HW=$(echo "$1" | sed -nE 's/^([0-9A-Fa-f]{2}(:[0-9A-Fa-f]{2}){5}):ip:.*$/\1/p')
+        S_IP=$(echo "$1" | sed -nE 's/^.*:ip:([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})$/\1/p')
     fi
 }
 
 # Create udev rules based on the macToip mapping + ifcfg network scripts
 udev_from_ifcfg() {
     # Check if the network scripts directory exists
-    if [[ ! -d "$NETWORK_SCRIPTS_DIR" ]]; then
+    if [ ! -d "$NETWORK_SCRIPTS_DIR" ]; then
         echo "Warning: Directory $NETWORK_SCRIPTS_DIR does not exist."
         return 0
     fi
@@ -46,24 +46,32 @@ udev_from_ifcfg() {
     while IFS= read -r line; do
         # Extract S_HW and S_IP
         extract_mac_ip "$line"
-        
-        # If S_HW and S_IP were extracted, proceed
-        [[ -z  "$S_HW" || -z "$S_IP" ]] && continue
 
-        # Source the matching file, if found
+        # If S_HW and S_IP were not extracted, skip the line
+        if [ -z "$S_HW" ] || [ -z "$S_IP" ]; then
+            continue
+        fi
+
+        # Find the matching network script file
         IFCFG=$(grep -l "IPADDR=$S_IP" "$NETWORK_SCRIPTS_DIR"/*)
-        [[ -z "$IFCFG" ]] && continue
-        source "$IFCFG"
+        if [ -z "$IFCFG" ]; then
+            continue
+        fi
 
-        echo "SUBSYSTEM==\"net\",ACTION==\"add\",ATTR{address}==\"$S_HW\",NAME=\"$DEVICE\""
+        # Source the matching file, if found
+        DEVICE=$(grep '^DEVICE=' "$IFCFG" | cut -d'=' -f2)
+        if [ -z "$DEVICE" ]; then
+            continue
+        fi
 
+        echo "SUBSYSTEM==\"net\",ACTION==\"add\",ATTR{address}==\"$S_HW\",NAME=\"$DEVICE\""
     done < "$V2V_MAP_FILE"
 }
 
 # Create udev rules based on the macToip mapping + network manager connections
 udev_from_nm() {
-     # Check if the network connections directory exists
-    if [[ ! -d "$NETWORK_CONNECTIONS_DIR" ]]; then
+    # Check if the network connections directory exists
+    if [ ! -d "$NETWORK_CONNECTIONS_DIR" ]; then
         echo "Warning: Directory $NETWORK_CONNECTIONS_DIR does not exist."
         return 0
     fi
@@ -73,16 +81,22 @@ udev_from_nm() {
         # Extract S_HW and S_IP
         extract_mac_ip "$line"
 
-        # If S_HW and S_IP were extracted, proceed
-        [[ -z  "$S_HW" || -z "$S_IP" ]] && continue
+        # If S_HW and S_IP were not extracted, skip the line
+        if [ -z "$S_HW" ] || [ -z "$S_IP" ]; then
+            continue
+        fi
 
         # Find the matching NetworkManager connection file
         NM_FILE=$(grep -El "address[0-9]*=$S_IP" "$NETWORK_CONNECTIONS_DIR"/*)
-        [[ -z "$NM_FILE" ]] && continue
+        if [ -z "$NM_FILE" ]; then
+            continue
+        fi
 
         # Extract the DEVICE (interface name) from the matching file
-        DEVICE=$(grep -oP '^interface-name=\K.*' "$NM_FILE")
-        [[ -z "$DEVICE" ]] && continue
+        DEVICE=$(grep '^interface-name=' "$NM_FILE" | cut -d'=' -f2)
+        if [ -z "$DEVICE" ]; then
+            continue
+        fi
 
         echo "SUBSYSTEM==\"net\",ACTION==\"add\",ATTR{address}==\"$S_HW\",NAME=\"$DEVICE\""
     done < "$V2V_MAP_FILE"
@@ -93,7 +107,7 @@ check_dupe_hws() {
     input=$(cat)
 
     # Extract MAC addresses, convert to uppercase, sort them, and find duplicates
-    dupes=$(grep -io -E "[0-9A-F:]{17}" <<< "$input" | tr 'a-f' 'A-F' | sort | uniq -d)
+    dupes=$(echo "$input" | grep -ioE "[0-9A-F:]{17}" | tr 'a-f' 'A-F' | sort | uniq -d)
 
     # If duplicates are found, print an error and exit
     if [ -n "$dupes" ]; then
diff --git a/virt-v2v/cold/scripts/rhel/run/network_config_util_test b/virt-v2v/cold/scripts/rhel/run/network_config_util_test
index 1ff41c2e2..f21ab6fb3 100644
--- a/virt-v2v/cold/scripts/rhel/run/network_config_util_test
+++ b/virt-v2v/cold/scripts/rhel/run/network_config_util_test
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd)"
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 
 # Temporary directory for testing
 TEST_DIR=$(mktemp -d)
@@ -17,17 +17,17 @@ rm -rf "$NETWORK_SCRIPTS_DIR" "$NETWORK_CONNECTIONS_DIR"
 mkdir -p "$NETWORK_SCRIPTS_DIR" "$NETWORK_CONNECTIONS_DIR"
 
 # Create mock data
-echo -e "aa:bb:cc:dd:ee:ff:ip:192.168.1.10\naa:bb:cc:dd:ee:fe:ip:192.168.1.11\naa:bb:cc:dd:ee:fd:ip:2001:0db8:85a3:0000:0000:8a2e:0370:7334\n" > "$V2V_MAP_FILE"
-echo -e "DEVICE=eth0\nIPADDR=192.168.1.10" > "$NETWORK_SCRIPTS_DIR/ifcfg-eth0"
-echo -e "[connection]\ninterface-name=eth3\naddress1=192.168.1.11/24" > "$NETWORK_CONNECTIONS_DIR/eth1 but with spaces.nmconnection"
+printf "aa:bb:cc:dd:ee:ff:ip:192.168.1.10\naa:bb:cc:dd:ee:fe:ip:192.168.1.11\naa:bb:cc:dd:ee:fd:ip:2001:0db8:85a3:0000:0000:8a2e:0370:7334\n" > "$V2V_MAP_FILE"
+printf "DEVICE=eth0\nIPADDR=192.168.1.10\n" > "$NETWORK_SCRIPTS_DIR/ifcfg-eth0"
+printf "[connection]\ninterface-name=eth3\naddress1=192.168.1.11/24\n" > "$NETWORK_CONNECTIONS_DIR/eth1 but with spaces.nmconnection"
 
 # Source the script under test
-source ${SCRIPT_DIR}/network_config_util.sh
+. ${SCRIPT_DIR}/network_config_util.sh
 
 # Run the script
 main
 
-echo -e "\nTest output:"
+printf "\nTest output:\n"
 cat $UDEV_RULES_FILE
 
 # Test 1: Verify the udev rules file was created