thank you for your reply
I think you forget to use a --prefix when compiling tarballs ??
 
Sebastien

 # ls /usr/local/bin
nxproxy             x2golistsessions           x2gostartagent
x2gobasepath        x2gomountdirs              x2gosuspend
x2gocmdexitmessage  x2goprint                  x2gosuspend-agent
x2gofeature         x2goresume-session         x2gosuspend-session
x2gofeaturelist     x2goruncommand             x2goterminate
x2gogetapps         x2goserver-run-extensions  x2goterminate-session
x2gogetservers      x2gosessionlimit           x2goumount_session
x2golistdesktops    x2gosetkeyboard            x2goumount-session
x2golistmounts      x2goshowblocks             x2goversion

# find / |grep -i x2goagent
/root/nx-libs-3.5.0.15/bin/x2goagent
/root/nx-libs-3.5.0.15/nx-X11/programs/Xserver/hw/nxagent/man/x2goagent.1
/root/nx-libs-3.5.0.15/doc/applied-patches/209_x2goagent-add-man-page.full.patch
...and other files

# cp /root/nx-libs-3.5.0.15/bin/x2goagent /usr/local/bin/x2goagent
# chmod 755 /usr/local/bin/x2goagent
# ln -s /usr/local/bin/x2goagent /usr/local/bin/nxagent
 
# grep ^id /etc/inittab
id:5:initdefault:
 
# /usr/local/bin/nxagent
/usr/local/bin/nxagent: line 30: /usr/lib/nx/../x2go/x2goagent: No such file or directory
/usr/local/bin/nxagent: line 30: exec: /usr/lib/nx/../x2go/x2goagent: cannot execute: No such file or directory
 
# ls /usr/lib/nx/../x2go/
extensions                            x2gogetdisplays       x2gologlevel
libx2go-server-db-sqlite3-wrapper     x2gogetports          x2goresume
libx2go-server-db-sqlite3-wrapper.pl  x2gogetstatus         x2gormport
x2gochangestatus                      x2goinsertport        x2gosuspend-agent
x2gocreatesession                     x2goinsertsession     x2gosyslog
x2gogetagent                          x2golistsessions_sql
 
# find / |grep x2goagent
/usr/local/bin/x2goagent
/root/nx-libs-3.5.0.15/bin/x2goagent
... and other files
 
# cat /etc/redhat-release
CentOS release 5.8 (Final)