added check dependencies

README.md

@@ -86,6 +86,7 @@ ____
 > * tar
 > * [Python 3](https://www.python.org/downloads/) (tested version 3.9.5 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/))
 > * existing [/usr/local/bin/sendmail.py](https://git.hmp.today/pavel.muhortov/utils#sendmail-py)
+> * [curl](https://curl.se/download.html) (tested version 7.74.0 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/))
 
 |  POSITION | PARAMETERS   |       DESCRIPTION      |    DEFAULT    |
 |-----------|--------------|------------------------|---------------|
@@ -136,5 +137,5 @@ sudo  ./ovpn del username -f
 
 ```bash
 # check journal
-tail -f /var/log/openvpn/ovpn.log
+tail -f /var/log/openvpn/ovpn-client-management.log
 ```

ovpn-client-management.sh

@@ -410,6 +410,15 @@ logs=/dev/null
 #
 
 if checkroot; then
+  if ! command -v chpasswd &> /dev/null || \
+     ! command -v /usr/sbin/openvpn &> /dev/null || \
+     ! command -v /etc/openvpn/easy-rsa/easyrsa &> /dev/null || \
+     ! command -v tar &> /dev/null || \
+     ! command -v /usr/local/bin/sendmail.py &> /dev/null || \
+     ! command -v python3 &> /dev/null || \
+     ! command -v curl &> /dev/null; then
+    execerror "Not found dependencies"
+  fi
   getconfig
   if [ "${clienttodo}" == "add" ] && \
      [ -n "${clientname}" ] && \