Does dpkg -l |grep libtool show you that libtool-bin is installed? From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Aqs Younas Sent: Friday, December 4, 2015 1:54 PM To: FreeSWITCH Users Help <freeswitch-users@lists.freeswitch.org> Subject: [Freeswitch-users] You need libtool version 1.5.14 or newer to build Freeswitch. Hi, I am installing freeswitch on fresh debian jessie 8 and following this page. https://freeswitch.org/confluence/display/FREESWITCH/Debian+8+Jessie When i run bootstrap.sh i encounter this error though llibtool_2.4.2-1.11_all.deb is installed on my machine. root@debian:/usr/src/freeswitch.git# <mailto:root@debian:/usr/src/freeswitch.git#> ./bootstrap.sh bootstrap: checking installation... bootstrap: autoconf version 2.69 (ok) bootstrap: automake version 1.14.1 (ok) bootstrap: aclocal version 1.14.1 (ok) bootstrap: libtool not found. You need libtool version 1.5.14 or newer to build FreeSWITCH from source. How can i fix this? Best Regards.