If during ehealth install or upgrade you should receive the following error :
FAIL -- The value of timezone environment variable [TZ] is not supported
follow these steps:
1) Browse the timezone.xx.txt file where xx is the OS value.
there are three values i.e.
#NH Internal Name LINUX Name User Visible Label
gmt1 Etc/GMT+1 "(GMT-01:00) Azo
Locate your desired timezone in the second column , in this sample the right value is Etc/GMT+1
2) Set the TZ variable into /etc/profile and nethealthrc.sh & .csh files
3) Restart upgrade or installation