diff --git a/lib/bkctld-firewall b/lib/bkctld-firewall
index d063fb4..eacb752 100755
--- a/lib/bkctld-firewall
+++ b/lib/bkctld-firewall
@@ -13,7 +13,7 @@ fi
 
 if [ -n "${FIREWALL_RULES}" ]; then
     [ -f "${FIREWALL_RULES}" ] && sed -i "/#${jail}$/d" "${FIREWALL_RULES}"
-    if ( check_jail "${jail}" ); then
+    if [ -d "${JAILDIR}/${jail}" ]; then
         port=$("${LIBDIR}/bkctld-port" "${jail}")
         for ip in $("${LIBDIR}/bkctld-ip" "${jail}"); do
             echo "/sbin/iptables -A INPUT -p tcp --sport 1024: --dport ${port} -s ${ip} -j ACCEPT #${jail}" >> "${FIREWALL_RULES}"
diff --git a/lib/bkctld-init b/lib/bkctld-init
index 8010c6c..29fe670 100755
--- a/lib/bkctld-init
+++ b/lib/bkctld-init
@@ -10,7 +10,7 @@ jail="${1:-}"
 if [ ! -n "${jail}" ]; then
     "${LIBDIR}/bkctld-help" && exit 1
 fi
-check_jail "${jail}" && error "${jail} : trying to create existant jail"
+[ -d "${JAILDIR}/${jail}" ] && error "${jail} : trying to create existant jail"
 
 sshd_config="${TPLDIR}/sshd_config"
 inctpl="${TPLDIR}/inc.tpl"
diff --git a/lib/bkctld-ip b/lib/bkctld-ip
index 49cb1b8..5512b12 100755
--- a/lib/bkctld-ip
+++ b/lib/bkctld-ip
@@ -11,7 +11,7 @@ ip="${2:-}"
 if [ ! -n "${jail}" ]; then
     "${LIBDIR}/bkctld-help" && exit 1
 fi
-check_jail "${jail}" || error "${jail} : inexistant jail'"
+[ -d "${JAILDIR}/${jail}" ] || error "${jail} : inexistant jail'"
 
 if [ -z "${ip}" ]; then
     grep -E "^AllowUsers" "${JAILDIR}/$jail/${SSHD_CONFIG}"|grep -Eo "root@[^ ]+"| while read allow; do
diff --git a/lib/bkctld-is-on b/lib/bkctld-is-on
index 41f548a..ac19ce0 100755
--- a/lib/bkctld-is-on
+++ b/lib/bkctld-is-on
@@ -10,7 +10,7 @@ jail="${1:-}"
 if [ ! -n "${jail}" ]; then
     "${LIBDIR}/bkctld-help" && exit 1
 fi
-check_jail "${jail}" || error "${jail} : trying to check inexistant jail"
+[ -d "${JAILDIR}/${jail}" ] || error "${jail} : trying to check inexistant jail"
 
 jail="${1}"
 return=1
diff --git a/lib/bkctld-key b/lib/bkctld-key
index bf75f8d..5fb8c53 100755
--- a/lib/bkctld-key
+++ b/lib/bkctld-key
@@ -11,7 +11,7 @@ keyfile="${2:-}"
 if [ ! -n "${jail}" ]; then
     "${LIBDIR}/bkctld-help" && exit 1
 fi
-check_jail "${jail}" || error "${jail} : inexistant jail'"
+[ -d "${JAILDIR}/${jail}" ] || error "${jail} : inexistant jail'"
 
 if [ -z "${keyfile}" ]; then
     if [ -f "${JAILDIR}/${jail}/${AUTHORIZED_KEYS}" ]; then
diff --git a/lib/bkctld-port b/lib/bkctld-port
index 86f05fc..6f86092 100755
--- a/lib/bkctld-port
+++ b/lib/bkctld-port
@@ -11,7 +11,7 @@ port="${2:-}"
 if [ ! -n "${jail}" ]; then
     "${LIBDIR}/bkctld-help" && exit 1
 fi
-check_jail "${jail}" || error "${jail} : inexistant jail'"
+[ -d "${JAILDIR}/${jail}" ] || error "${jail} : inexistant jail'"
 
 if [ -z "${port}" ]; then
     grep -E "Port [0-9]+" "${JAILDIR}/${jail}/${SSHD_CONFIG}"|grep -oE "[0-9]+"
diff --git a/lib/bkctld-reload b/lib/bkctld-reload
index 1b8701f..3f2fb56 100755
--- a/lib/bkctld-reload
+++ b/lib/bkctld-reload
@@ -10,7 +10,7 @@ jail="${1:-}"
 if [ ! -n "${jail}" ]; then
     "${LIBDIR}/bkctld-help" && exit 1
 fi
-check_jail "${jail}" || error "${jail} : trying to reload inexistant jail"
+[ -d "${JAILDIR}/${jail}" ] || error "${jail} : trying to reload inexistant jail"
 "${LIBDIR}/bkctld-is-on" "${jail}" || exit 0
 
 pid=$(cat "${JAILDIR}/${jail}/${SSHD_PID}")
diff --git a/lib/bkctld-remove b/lib/bkctld-remove
index bbd4884..a8d6df7 100755
--- a/lib/bkctld-remove
+++ b/lib/bkctld-remove
@@ -10,7 +10,7 @@ jail="${1:-}"
 if [ ! -n "${jail}" ]; then
     "${LIBDIR}/bkctld-help" && exit 1
 fi
-check_jail "${jail}" || error "${jail} : trying to remove inexistant jail"
+[ -d "${JAILDIR}/${jail}" ] || error "${jail} : trying to remove inexistant jail"
 "${LIBDIR}/bkctld-is-on" "${jail}" && "${LIBDIR}/bkctld-stop" "${jail}"
 
 rm -f "${CONFDIR}/${jail}"
diff --git a/lib/bkctld-restart b/lib/bkctld-restart
index 40701bc..22d778e 100755
--- a/lib/bkctld-restart
+++ b/lib/bkctld-restart
@@ -12,6 +12,6 @@ jail="${1:-}"
 if [ ! -n "${jail}" ]; then
     "${LIBDIR}/bkctld-help" && exit 1
 fi
-check_jail "${jail}" || error "${jail} : trying to restart inexistant jail"
+[ -d "${JAILDIR}/${jail}" ] || error "${jail} : trying to restart inexistant jail"
 "${LIBDIR}/bkctld-is-on" "${jail}" && "${LIBDIR}/bkctld-stop" "${jail}"
 "${LIBDIR}/bkctld-start" "${jail}"
diff --git a/lib/bkctld-start b/lib/bkctld-start
index 9749633..810c5ce 100755
--- a/lib/bkctld-start
+++ b/lib/bkctld-start
@@ -10,7 +10,7 @@ jail="${1:-}"
 if [ ! -n "${jail}" ]; then
     "${LIBDIR}/bkctld-help" && exit 1
 fi
-check_jail "${jail}" || error "${jail} : trying to start inexistant jail"
+[ -d "${JAILDIR}/${jail}" ] || error "${jail} : trying to start inexistant jail"
 "${LIBDIR}/bkctld-is-on" "${jail}" && exit 0
 
 cd "${JAILDIR}/${jail}"
diff --git a/lib/bkctld-status b/lib/bkctld-status
index d2e3dfa..b873ced 100755
--- a/lib/bkctld-status
+++ b/lib/bkctld-status
@@ -10,7 +10,7 @@ jail="${1:-}"
 if [ ! -n "${jail}" ]; then
     "${LIBDIR}/bkctld-help" && exit 1
 fi
-check_jail "${jail}" || error "${jail} : inexistant jail ! Use '$0 status' for list all"
+[ -d "${JAILDIR}/${jail}" ] || error "${jail} : inexistant jail ! Use '$0 status' for list all"
 
 inc="0"
 if [ -f "${CONFDIR}/${jail}" ]; then
diff --git a/lib/bkctld-stop b/lib/bkctld-stop
index 8f76cd7..cdb2b25 100755
--- a/lib/bkctld-stop
+++ b/lib/bkctld-stop
@@ -10,7 +10,7 @@ jail="${1:-}"
 if [ ! -n "${jail}" ]; then
     "${LIBDIR}/bkctld-help" && exit 1
 fi
-check_jail "${jail}" || error "${jail} : trying to stop inexistant jail"
+[ -d "${JAILDIR}/${jail}" ] || error "${jail} : trying to stop inexistant jail"
 "${LIBDIR}/bkctld-is-on" "${jail}" || exit 0
 
 pid=$(cat "${JAILDIR}/${jail}/${SSHD_PID}")
diff --git a/lib/bkctld-sync b/lib/bkctld-sync
index b484bac..65eb58b 100755
--- a/lib/bkctld-sync
+++ b/lib/bkctld-sync
@@ -10,7 +10,7 @@ jail="${1:-}"
 if [ ! -n "${jail}" ]; then
     "${LIBDIR}/bkctld-help" && exit 1
 fi
-check_jail "${jail}" || error "${jail} : trying to sync inexistant jail"
+[ -d "${JAILDIR}/${jail}" ] || error "${jail} : trying to sync inexistant jail"
 
 [ -n "${NODE}" ] || error "Sync need config of \$NODE in /etc/default/bkctld !"
 
diff --git a/lib/bkctld-update b/lib/bkctld-update
index 1998fea..4e8f141 100755
--- a/lib/bkctld-update
+++ b/lib/bkctld-update
@@ -10,7 +10,7 @@ jail="${1:-}"
 if [ ! -n "${jail}" ]; then
     "${LIBDIR}/bkctld-help" && exit 1
 fi
-check_jail "${jail}" || error "${jail} : trying to update inexistant jail"
+[ -d "${JAILDIR}/${jail}" ] || error "${jail} : trying to update inexistant jail"
 "${LIBDIR}/bkctld-is-on" "${jail}" && "${LIBDIR}/bkctld-stop" "${jail}"
 
 . "${LIBDIR}/mkjail"
diff --git a/lib/config b/lib/config
index 0c14959..d71ad55 100755
--- a/lib/config
+++ b/lib/config
@@ -20,4 +20,3 @@ WARNING="${WARNING:-24}"
 DUC=$(command -v duc-nox||command -v duc)
 
 . "${LIBDIR}/logging"
-. "${LIBDIR}/functions"
diff --git a/lib/functions b/lib/functions
deleted file mode 100755
index c21fc2c..0000000
--- a/lib/functions
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/bin/sh
-
-check_jail() {
-    jail="${1}"
-    [ -d "${JAILDIR}/${jail}" ] && return 0
-    return 1
-}