[Zabbix-users] Log file - permission denied

[Account f. A. <fo...@i-...>]

Hi

I create item to read log file exactly log[/var/log/auth.log] , I add 
zabbix to adm group, now zabbix user with shell cant read log file but  
item always status is a not suppported.

 su - zabbix
zabbix@dollot:~$ id
uid=1004(zabbix) gid=1004(zabbix) groups=4(adm),1004(zabbix)
zabbix@dollot:~$ tail -f /var/log/auth.log
Jan 17 08:34:02 dollot postfix/smtpd[26952]: sql auxprop plugin using 
mysql engine
Jan 17 08:39:01 dollot CRON[27117]: pam_unix(cron:session): session 
opened for user root by (uid=0)
Jan 17 08:39:01 dollot CRON[27117]: pam_unix(cron:session): session 
closed for user root
Jan 17 08:41:15 dollot su[27174]: Successful su for zabbix by root
Jan 17 08:41:15 dollot su[27174]: + pts/1 root:zabbix
Jan 17 08:41:15 dollot su[27174]: pam_unix(su:session): session opened 
for user zabbix by root(uid=0)
Jan 17 08:41:58 dollot su[27174]: pam_unix(su:session): session closed 
for user zabbix
Jan 17 08:41:59 dollot su[27214]: Successful su for zabbix by root
Jan 17 08:41:59 dollot su[27214]: + pts/1 root:zabbix
Jan 17 08:41:59 dollot su[27214]: pam_unix(su:session): session opened 
for user zabbix by root(uid=0)

Any ideas?

Albert