diff --git a/.github/workflows/shellcheck.yml b/.github/workflows/shellcheck.yml
index b706ca28..c5f373be 100644
--- a/.github/workflows/shellcheck.yml
+++ b/.github/workflows/shellcheck.yml
@@ -29,7 +29,8 @@ jobs:
           # Excluding SC2124: Assigning an array to a string! Check instead if
           #                   this is a false positive or if there is a better
           #                   way to do it.
-          SHELLCHECK_OPTS: -e SC3043 -e SC2154 -e SC3037 -e SC2155 -e SC2124
+          # Excluding SC2106: This only exits the subshell caused by the (...) group.
+          SHELLCHECK_OPTS: -e SC3043 -e SC2154 -e SC3037 -e SC2155 -e SC2124 -e SC2106
         with:
           severity: warning
           scandir: "./usr/local/share/bastille"
diff --git a/usr/local/bin/bastille b/usr/local/bin/bastille
index bb1c712c..cb97e833 100755
--- a/usr/local/bin/bastille
+++ b/usr/local/bin/bastille
@@ -147,7 +147,8 @@ fi
 . /usr/local/share/bastille/common.sh
 
 # Handle options
-PARALLEL_MODE=0
+bastille_parallel_mode=0
+bastille_process_limit="${bastille_process_limit:-1}"
 while [ "$#" -gt 0 ]; do
     case "${1}" in
         -h|--help|help)
@@ -171,10 +172,10 @@ while [ "$#" -gt 0 ]; do
             shift 2
             ;;
         -p|--parallel)
-            PARALLEL_MODE=1
-            PROCESS_LIMIT="${2}"
-            if ! echo "${PROCESS_LIMIT}" | grep -Eq "^[0-9]+$"; then
-                error_exit "Not a valid process limit: ${PROCESS_LIMIT}"
+            bastille_parallel_mode=1
+            bastille_process_limit="${2}"
+            if ! echo "${bastille_process_limit}" | grep -Eq "^[0-9]+$"; then
+                error_exit "Not a valid process limit: ${bastille_process_limit}"
             else
                 shift 2
             fi
@@ -188,6 +189,9 @@ while [ "$#" -gt 0 ]; do
     esac
 done
 
+# Export parallel and limit
+export bastille_process_limit
+
 if [ "$#" -lt 1 ]; then
     usage
 else
@@ -204,10 +208,10 @@ case "${CMD}" in
     convert| \
     create| \
     edit| \
+    etcupdate| \
     export| \
     htop| \
     import| \
-    jcp| \
     limits| \
     list| \
     migrate| \
@@ -217,9 +221,10 @@ case "${CMD}" in
     rename| \
     setup| \
     top| \
-    verify| \
-    zfs)
-        if [ "${PARALLEL_MODE}" -eq 1 ]; then
+    update| \
+    upgrade| \
+    verify)
+        if [ "${bastille_parallel_mode}" -eq 1 ]; then
             error_exit "Command does not support parallel mode: ${CMD}"
         fi
         ;;
@@ -228,7 +233,7 @@ case "${CMD}" in
     config| \
     cp| \
     destroy| \
-    etcupdate| \
+    jcp| \
     limits| \
     mount| \
     pkg| \
@@ -240,45 +245,7 @@ case "${CMD}" in
     tags| \
     template| \
     umount| \
-    update| \
-    upgrade)
-        # Extract JAILS from command for parallel mode
-        OPTIONS=""
-        while [ "$#" -gt 0 ] && [ "${PARALLEL_MODE}" -eq 1 ]; do
-            case "${1}" in
-                -d|--delay)
-                    OPTIONS="${OPTIONS} ${1} ${2}"
-                    shift 2
-                    ;;
-                -*)
-                    OPTIONS="${OPTIONS} ${1}"
-                    shift 1
-                    ;;
-                *)
-                    case "${CMD}" in
-                        stop|destroy)
-                            if ! set_target "${1}" "reverse" >/dev/null 2>&1; then
-                                OPTIONS="${OPTIONS} ${1}"
-                                shift 1
-                            else
-                                XARGS_JAILS="${JAILS}"
-                                shift 1
-                                break
-                            fi
-                            ;;
-                        *)
-                            if ! set_target "${1}" >/dev/null 2>&1; then
-                                OPTIONS="${OPTIONS} ${1}"
-                                shift 1
-                            else
-                                XARGS_JAILS="${JAILS}"
-                                shift 1
-                                break
-                            fi
-                            ;;
-                    esac
-            esac
-        done
+    zfs)
         ;;
     *)
         usage
@@ -294,12 +261,8 @@ if [ -f "${SCRIPTPATH}" ]; then
     umask "${UMASK}"
 
     : "${SH:=sh}"
-    
-    if [ "${PARALLEL_MODE}" -eq 1 ]; then
-        echo "${XARGS_JAILS}" | xargs -P "${PROCESS_LIMIT}" -I {} "${SH}" "${SCRIPTPATH}" ${OPTIONS} {} "$@"
-    else
-        exec "${SH}" "${SCRIPTPATH}" "$@"
-    fi
+
+    exec "${SH}" "${SCRIPTPATH}" "$@"
 
 else
     error_exit "${SCRIPTPATH} not found."	
diff --git a/usr/local/share/bastille/cmd.sh b/usr/local/share/bastille/cmd.sh
index 1dc69d91..914a1f8a 100644
--- a/usr/local/share/bastille/cmd.sh
+++ b/usr/local/share/bastille/cmd.sh
@@ -91,6 +91,8 @@ set_target "${TARGET}"
 
 for _jail in ${JAILS}; do
 
+    (
+
     # Validate jail state
     check_target_is_running "${_jail}" || if [ "${AUTO}" -eq 1 ]; then
         bastille start "${_jail}"
@@ -123,7 +125,12 @@ for _jail in ${JAILS}; do
         RETURN=$(($RETURN+$ERROR_CODE))
     fi
 
+    ) &
+
+    bastille_running_jobs "${bastille_process_limit}"
+	
 done
+wait
 
 # Check when a command is executed in all running jails. (bastille cmd ALL ...)
 if [ "${COUNT}" -gt 1 ] && [ "${RETURN}" -gt 0 ]; then
diff --git a/usr/local/share/bastille/common.sh b/usr/local/share/bastille/common.sh
index ee3eb387..21dcf6f8 100644
--- a/usr/local/share/bastille/common.sh
+++ b/usr/local/share/bastille/common.sh
@@ -93,6 +93,23 @@ warn() {
     echo -e "${COLOR_YELLOW}$*${COLOR_RESET}"
 }
 
+# Parallel mode, don't exceed process limit
+bastille_running_jobs() {
+
+  _process_limit="${1}"
+  _running_jobs=$((_running_jobs + 1))
+
+  if [ "${_running_jobs}" -ge "${_process_limit}" ]; then
+
+    # Wait for at least one process to finish
+    wait 2>/dev/null || wait
+
+    _running_jobs=$((_running_jobs - 1))
+
+  fi
+
+}
+
 check_target_exists() {
     local _TARGET="${1}"
     local _jaillist="$(bastille list jails)"
diff --git a/usr/local/share/bastille/config.sh b/usr/local/share/bastille/config.sh
index d8c8b7c7..642c1036 100644
--- a/usr/local/share/bastille/config.sh
+++ b/usr/local/share/bastille/config.sh
@@ -116,6 +116,8 @@ print_jail_conf() {
 
 for _jail in ${JAILS}; do
 
+    (
+
     # Handle Bastille specific properties
     # Currently only 'depend' 'priority' and 'boot'
     if [ "${PROPERTY}" = "priority" ] || [ "${PROPERTY}" = "prio" ]; then
@@ -290,7 +292,13 @@ for _jail in ${JAILS}; do
             rm "${_tmpfile}"
         fi
     fi
+
+    ) &
+
+    bastille_running_jobs "${bastille_process_limit}"
+	
 done
+wait
 
 # Only display this message once at the end (not for every jail). -- cwells
 if { [ "${ACTION}" = "set" ] || [ "${ACTION}" = "remove" ]; } && [ -z "${BASTILLE_PROPERTY}" ]; then
diff --git a/usr/local/share/bastille/cp.sh b/usr/local/share/bastille/cp.sh
index 5c2f47df..10d4760e 100644
--- a/usr/local/share/bastille/cp.sh
+++ b/usr/local/share/bastille/cp.sh
@@ -89,6 +89,8 @@ set_target "${TARGET}"
 
 for _jail in ${JAILS}; do
 
+    (
+
     info "\n[${_jail}]:"
 	
     host_path="${HOST_PATH}"
@@ -97,5 +99,10 @@ for _jail in ${JAILS}; do
     if ! cp "${OPTION}" "${host_path}" "${jail_path}"; then
         error_continue "[ERROR]: CP failed: ${host_path} -> ${jail_path}"
     fi
+
+    ) &
+	
+    bastille_running_jobs "${bastille_process_limit}"
 	
 done
+wait
diff --git a/usr/local/share/bastille/destroy.sh b/usr/local/share/bastille/destroy.sh
index bb73ddd5..2f506b27 100644
--- a/usr/local/share/bastille/destroy.sh
+++ b/usr/local/share/bastille/destroy.sh
@@ -53,6 +53,8 @@ destroy_jail() {
 
     for _jail in ${JAILS}; do
 
+        (
+
         bastille_jail_base="${bastille_jailsdir}/${_jail}"
         bastille_jail_log="${bastille_logsdir}/${_jail}_console.log"
 
@@ -117,8 +119,14 @@ destroy_jail() {
                 pfctl -a "rdr/${_jail}" -Fn
             fi
         fi
+
+    ) &
 	
-    done
+    bastille_running_jobs "${bastille_process_limit}"
+	
+done
+wait
+
 }
 
 destroy_rel() {
diff --git a/usr/local/share/bastille/jcp.sh b/usr/local/share/bastille/jcp.sh
index fbc3e829..0e2c736a 100644
--- a/usr/local/share/bastille/jcp.sh
+++ b/usr/local/share/bastille/jcp.sh
@@ -91,6 +91,8 @@ set_target "${DEST_TARGET}" && DEST_TARGET="${JAILS}"
 
 for _jail in ${DEST_TARGET}; do
 
+    (
+
     if [ "${_jail}" = "${SOURCE_TARGET}" ]; then
         continue
     else
@@ -105,6 +107,10 @@ for _jail in ${DEST_TARGET}; do
         fi
 		
     fi
-done
 
-echo
\ No newline at end of file
+    ) &
+	
+    bastille_running_jobs "${bastille_process_limit}"
+	
+done
+wait
\ No newline at end of file
diff --git a/usr/local/share/bastille/limits.sh b/usr/local/share/bastille/limits.sh
index 0d12032f..e841b9e7 100644
--- a/usr/local/share/bastille/limits.sh
+++ b/usr/local/share/bastille/limits.sh
@@ -131,6 +131,8 @@ add_cpuset() {
 
 for _jail in ${JAILS}; do
 
+    (
+
     check_target_is_running "${_jail}" || if [ "${AUTO}" -eq 1 ]; then
         bastille start "${_jail}"
     else
@@ -284,4 +286,10 @@ for _jail in ${JAILS}; do
             ;;
 
     esac
+
+    ) &
+	
+    bastille_running_jobs "${bastille_process_limit}"
+	
 done
+wait
diff --git a/usr/local/share/bastille/mount.sh b/usr/local/share/bastille/mount.sh
index d412a00c..32394b5c 100644
--- a/usr/local/share/bastille/mount.sh
+++ b/usr/local/share/bastille/mount.sh
@@ -139,6 +139,8 @@ fi
 
 for _jail in ${JAILS}; do
 
+    (
+
     check_target_is_running "${_jail}" || if [ "${AUTO}" -eq 1 ]; then
         bastille start "${_jail}"
     else
@@ -196,4 +198,9 @@ for _jail in ${JAILS}; do
     mount -F "${bastille_jailsdir}/${_jail}/fstab" -a || error_continue "Failed to mount volume: ${_fullpath}"
     echo "Added: ${_fstab_entry}"
 
-done
\ No newline at end of file
+    ) &
+	
+    bastille_running_jobs "${bastille_process_limit}"
+	
+done
+wait
\ No newline at end of file
diff --git a/usr/local/share/bastille/pkg.sh b/usr/local/share/bastille/pkg.sh
index b6918c8c..d73b6857 100644
--- a/usr/local/share/bastille/pkg.sh
+++ b/usr/local/share/bastille/pkg.sh
@@ -97,6 +97,8 @@ errors=0
 
 for _jail in ${JAILS}; do
 
+    (
+
     # Validate jail state
     check_target_is_running "${_jail}" || if [ "${AUTO}" -eq 1 ]; then
         bastille start "${_jail}"
@@ -128,7 +130,12 @@ for _jail in ${JAILS}; do
         fi
     fi
 	
+    ) &
+	
+    bastille_running_jobs "${bastille_process_limit}"
+	
 done
+wait
 
 if [ $errors -ne 0 ]; then
     error_exit "[ERROR]: Failed to apply on some jails, please check logs"
diff --git a/usr/local/share/bastille/restart.sh b/usr/local/share/bastille/restart.sh
index a812b440..dc1aed1b 100644
--- a/usr/local/share/bastille/restart.sh
+++ b/usr/local/share/bastille/restart.sh
@@ -112,10 +112,17 @@ set_target "${TARGET}"
 
 for _jail in ${JAILS}; do
 
+    (
+
     # Only restart running jails
     if check_target_is_running "${_jail}"; then
         bastille stop ${_stop_options} ${_jail}
         bastille start ${_start_options} ${_jail}
     fi
-    
-done
\ No newline at end of file
+
+    ) &
+
+    bastille_running_jobs "${bastille_process_limit}"
+
+done
+wait
\ No newline at end of file
diff --git a/usr/local/share/bastille/service.sh b/usr/local/share/bastille/service.sh
index 710b12f1..364dec5f 100644
--- a/usr/local/share/bastille/service.sh
+++ b/usr/local/share/bastille/service.sh
@@ -88,6 +88,8 @@ set_target "${TARGET}"
 
 for _jail in ${JAILS}; do
 
+    (
+
     # Validate jail state
     check_target_is_running "${_jail}" || if [ "${AUTO}" -eq 1 ]; then
         bastille start "${_jail}"
@@ -101,4 +103,9 @@ for _jail in ${JAILS}; do
 	
     jexec -l "${_jail}" /usr/sbin/service "$@"
 	
-done
\ No newline at end of file
+    ) &
+	
+    bastille_running_jobs "${bastille_process_limit}"
+	
+done
+wait
\ No newline at end of file
diff --git a/usr/local/share/bastille/start.sh b/usr/local/share/bastille/start.sh
index 9170ffd3..9226560c 100644
--- a/usr/local/share/bastille/start.sh
+++ b/usr/local/share/bastille/start.sh
@@ -104,6 +104,8 @@ set_target "${TARGET}"
 
 for _jail in ${JAILS}; do
 
+    (
+
     # Continue if '-b|--boot' is set and 'boot=off'
     if [ "${BOOT}" -eq 1 ]; then
         BOOT_ENABLED="$(sysrc -f ${bastille_jailsdir}/${_jail}/settings.conf -n boot)"
@@ -208,4 +210,9 @@ for _jail in ${JAILS}; do
     # Delay between jail action
     sleep "${DELAY_TIME}"
 
+    ) &
+	
+    bastille_running_jobs "${bastille_process_limit}"
+	
 done
+wait
diff --git a/usr/local/share/bastille/stop.sh b/usr/local/share/bastille/stop.sh
index 721ec137..9d1329f8 100644
--- a/usr/local/share/bastille/stop.sh
+++ b/usr/local/share/bastille/stop.sh
@@ -87,6 +87,8 @@ set_target "${TARGET}" "reverse"
 
 for _jail in ${JAILS}; do
 
+    (
+
     # Validate that all jails that 'depend' on this one are stopped
     for _depend_jail in $(ls --color=never ${bastille_jailsdir} | sed -e 's/\n//g'); do
     if ! grep -hoqsw "depend=" ${bastille_jailsdir}/${_depend_jail}/settings.conf; then
@@ -149,4 +151,9 @@ for _jail in ${JAILS}; do
         done
     fi
 
-done
\ No newline at end of file
+    ) &
+	
+    bastille_running_jobs "${bastille_process_limit}"
+	
+done
+wait
\ No newline at end of file
diff --git a/usr/local/share/bastille/sysrc.sh b/usr/local/share/bastille/sysrc.sh
index 727080b6..ac679e7b 100644
--- a/usr/local/share/bastille/sysrc.sh
+++ b/usr/local/share/bastille/sysrc.sh
@@ -88,6 +88,8 @@ set_target "${TARGET}"
 
 for _jail in ${JAILS}; do
 
+    (
+
     # Validate jail state
     check_target_is_running "${_jail}" || if [ "${AUTO}" -eq 1 ]; then
         bastille start "${_jail}"
@@ -101,4 +103,9 @@ for _jail in ${JAILS}; do
 	
     jexec -l "${_jail}" /usr/sbin/sysrc "$@"
 
-done
\ No newline at end of file
+    ) &
+	
+    bastille_running_jobs "${bastille_process_limit}"
+	
+done
+wait
\ No newline at end of file
diff --git a/usr/local/share/bastille/tags.sh b/usr/local/share/bastille/tags.sh
index 5aa0b757..28ef556b 100644
--- a/usr/local/share/bastille/tags.sh
+++ b/usr/local/share/bastille/tags.sh
@@ -77,6 +77,8 @@ set_target "${TARGET}"
 
 for _jail in ${JAILS}; do
 
+    (
+
     bastille_jail_tags="${bastille_jailsdir}/${_jail}/tags"
     case ${ACTION} in
         add)
@@ -118,4 +120,9 @@ for _jail in ${JAILS}; do
         ;;
     esac
 	
-done
\ No newline at end of file
+    ) &
+	
+    bastille_running_jobs "${bastille_process_limit}"
+	
+done
+wait
\ No newline at end of file
diff --git a/usr/local/share/bastille/template.sh b/usr/local/share/bastille/template.sh
index 8b9a7e0e..de6c0491 100644
--- a/usr/local/share/bastille/template.sh
+++ b/usr/local/share/bastille/template.sh
@@ -272,6 +272,8 @@ fi
 
 for _jail in ${JAILS}; do
 
+    (
+
     check_target_is_running "${_jail}" || if [ "${AUTO}" -eq 1 ]; then
         bastille start "${_jail}"
     else
@@ -474,4 +476,9 @@ for _jail in ${JAILS}; do
     
     info "\nTemplate applied: ${TEMPLATE}"
 
-done
\ No newline at end of file
+    ) &
+	
+    bastille_running_jobs "${bastille_process_limit}"
+	
+done
+wait
\ No newline at end of file
diff --git a/usr/local/share/bastille/umount.sh b/usr/local/share/bastille/umount.sh
index 7b56da38..37d8d082 100644
--- a/usr/local/share/bastille/umount.sh
+++ b/usr/local/share/bastille/umount.sh
@@ -88,6 +88,8 @@ set_target "${TARGET}"
 
 for _jail in ${JAILS}; do
 
+    (
+
     # Validate jail state
     check_target_is_running "${_jail}" || if [ "${AUTO}" -eq 1 ]; then
         bastille start "${_jail}"
@@ -128,4 +130,9 @@ for _jail in ${JAILS}; do
     
     echo "Unmounted: ${_jailpath}"
 	
-done
\ No newline at end of file
+    ) &
+	
+    bastille_running_jobs "${bastille_process_limit}"
+	
+done
+wait
\ No newline at end of file
diff --git a/usr/local/share/bastille/zfs.sh b/usr/local/share/bastille/zfs.sh
index fb0aa707..bddd675a 100644
--- a/usr/local/share/bastille/zfs.sh
+++ b/usr/local/share/bastille/zfs.sh
@@ -45,65 +45,25 @@ EOF
 }
 
 zfs_snapshot() {
-
-    for _jail in ${JAILS}; do
-
-        info "\n[${_jail}]:"
-	
-        # shellcheck disable=SC2140
-        zfs snapshot -r "${bastille_zfs_zpool}/${bastille_zfs_prefix}/jails/${_jail}"@"${TAG}"
-
-    done
-    
+    # shellcheck disable=SC2140
+    zfs snapshot -r "${bastille_zfs_zpool}/${bastille_zfs_prefix}/jails/${_jail}"@"${TAG}"
 }
 
 zfs_destroy_snapshot() {
-
-    for _jail in ${JAILS}; do
-
-        info "\n[${_jail}]:"
-	
-        # shellcheck disable=SC2140
-        zfs destroy -r "${bastille_zfs_zpool}/${bastille_zfs_prefix}/jails/${_jail}"@"${TAG}"
-
-    done
-
+    # shellcheck disable=SC2140
+    zfs destroy -r "${bastille_zfs_zpool}/${bastille_zfs_prefix}/jails/${_jail}"@"${TAG}"
 }
 
 zfs_set_value() {
-
-    for _jail in ${JAILS}; do
-
-        info "\n[${_jail}]:"
-	
-        zfs "${ATTRIBUTE}" "${bastille_zfs_zpool}/${bastille_zfs_prefix}/jails/${_jail}"
-	
-    done
-
+    zfs "${ATTRIBUTE}" "${bastille_zfs_zpool}/${bastille_zfs_prefix}/jails/${_jail}"
 }
 
 zfs_get_value() {
-
-    for _jail in ${JAILS}; do
-
-        info "\n[${_jail}]:"
-
-        zfs get "${ATTRIBUTE}" "${bastille_zfs_zpool}/${bastille_zfs_prefix}/jails/${_jail}"
-	
-    done
-    
+    zfs get "${ATTRIBUTE}" "${bastille_zfs_zpool}/${bastille_zfs_prefix}/jails/${_jail}"
 }
 
 zfs_disk_usage() {
-
-    for _jail in ${JAILS}; do
-
-        info "\n[${_jail}]:"
-	
-        zfs list -t all -o name,used,avail,refer,mountpoint,compress,ratio -r "${bastille_zfs_zpool}/${bastille_zfs_prefix}/jails/${_jail}"
-		
-    done
-    
+    zfs list -t all -o name,used,avail,refer,mountpoint,compress,ratio -r "${bastille_zfs_zpool}/${bastille_zfs_prefix}/jails/${_jail}"
 }
 
 
@@ -147,27 +107,40 @@ if [ -z "${bastille_zfs_zpool}" ]; then
     error_exit "[ERROR]: ZFS zpool not defined."
 fi
 
-case "${ACTION}" in
-    set)
-        ATTRIBUTE="${3}"
-        zfs_set_value
-        ;;
-    get)
-        ATTRIBUTE="${3}"
-        zfs_get_value
-        ;;
-    snap|snapshot)
-        TAG="${3}"
-        zfs_snapshot
-        ;;
-    destroy_snap|destroy_snapshot)
-        TAG="${3}"
-        zfs_destroy_snapshot
-        ;;
-    df|usage)
-        zfs_disk_usage
-        ;;
-    *)
-        usage
-        ;;
-esac
\ No newline at end of file
+for _jail in ${JAILS}; do
+
+    (
+
+    info "\n[${_jail}]:"
+
+    case "${ACTION}" in
+        set)
+            ATTRIBUTE="${3}"
+            zfs_set_value
+            ;;
+        get)
+            ATTRIBUTE="${3}"
+            zfs_get_value
+            ;;
+        snap|snapshot)
+            TAG="${3}"
+            zfs_snapshot
+            ;;
+        destroy_snap|destroy_snapshot)
+            TAG="${3}"
+            zfs_destroy_snapshot
+            ;;
+        df|usage)
+            zfs_disk_usage
+            ;;
+        *)
+            usage
+            ;;
+    esac
+
+    ) &
+
+    bastille_running_jobs "${bastille_process_limit}"
+	
+done
+wait
\ No newline at end of file