diff --git a/sources/lib/platform/aix/check_aix_fs_mounts.sh b/sources/lib/platform/aix/check_aix_fs_mounts.sh
index 3296fe5..6ba2a41 100644
--- a/sources/lib/platform/aix/check_aix_fs_mounts.sh
+++ b/sources/lib/platform/aix/check_aix_fs_mounts.sh
@@ -62,7 +62,7 @@ lsfs -ac >>${HC_STDOUT_LOG} 2>>${HC_STDERR_LOG}
 (( $? == 0)) || return $?
 
 # check for each auto-mount configured file system (except /)
-lsfs -ac |\
+lsfs -ac 2>/dev/null |\
     grep -v -E -e '^#' -e '^\/:' |\
     grep -E -e '.*:.*:.*:.*:.*:.*:.*:yes:.*' |\
     cut -f1 -d':' |\
diff --git a/sources/lib/platform/linux/check_linux_fs_mounts.sh b/sources/lib/platform/linux/check_linux_fs_mounts.sh
index 3a85ebf..5ce8bd9 100644
--- a/sources/lib/platform/linux/check_linux_fs_mounts.sh
+++ b/sources/lib/platform/linux/check_linux_fs_mounts.sh
@@ -62,11 +62,10 @@ mount >>${HC_STDOUT_LOG} 2>>${HC_STDERR_LOG}
 (( $? == 0 )) || return $?
 
 # check for each auto-mount configured file system (except /)
-cat /etc/fstab |\
-    grep -v -E -e '^#' -e '^$' \
-        -e '[ \t]*.*[ \t]+(proc|swap|sysfs|devpts|tmpfs).*' \
-        -e '(floppy|cdrom)' \
-        -e '[ \t]*\/[ \t]+' |\
+grep -v -E -e '^#' -e '^$' \
+   -e '[ \t]*.*[ \t]+(proc|swap|sysfs|devpts|tmpfs).*' \
+   -e '(floppy|cdrom)' \
+   -e '[ \t]*\/[ \t]+' etc/fstab 2>/dev/null |\
     awk '{print $2}' |\
 while read _FS
 do
diff --git a/sources/lib/platform/linux/check_linux_ntp_status.sh b/sources/lib/platform/linux/check_linux_ntp_status.sh
index 5408893..c101160 100644
--- a/sources/lib/platform/linux/check_linux_ntp_status.sh
+++ b/sources/lib/platform/linux/check_linux_ntp_status.sh
@@ -132,7 +132,7 @@ else
 fi
 
 # 1) active server
-_NTP_PEER="$(grep -E -e '^\*' 2>/dev/null ${HC_STDOUT_LOG} | awk '{ print $1 }') 2>/dev/null"
+_NTP_PEER="$(grep -E -e '^\*' 2>/dev/null ${HC_STDOUT_LOG} | awk '{ print $1 }' 2>/dev/null)"
 case ${_NTP_PEER} in
     \*127.127.1.0*)
         _MSG="NTP is synchronizing against its internal clock"
@@ -152,7 +152,7 @@ log_hc "$0" ${_STC} "${_MSG}"
 # 2) offset value
 if (( _STC == 0 ))
 then
-    _CURR_OFFSET="$(grep -E -e '^\*' 2>/dev/null ${HC_STDOUT_LOG} | awk '{ print $9 }') 2>/dev/null"
+    _CURR_OFFSET="$(grep -E -e '^\*' 2>/dev/null ${HC_STDOUT_LOG} | awk '{ print $9 }' 2>/dev/null)"
     case ${_CURR_OFFSET} in
         +([-0-9])*(.)*([0-9]))
             # numeric, OK (negatives are OK too!)