New version of

A new version of is available on GitHub. With new options and a bugfix for infiniband switches. Continue reading “New version of”


chpasswd not working after upgrade

After the upgrade of a infiniband switch from version 2.1.5-1 to 2.2.6-2 my script was not working anymore. It can’t change the password of the infiniband switches because the command chpasswd threw the following error:

[root@my_ib ~]# echo "root:MY_NEW_PW" |chpasswd -c SHA512
chpasswd: cannot open /etc/passwd

In the blog I’ll explain why it’s not working, how I found the root cause and a workaround.

Continue reading “chpasswd not working after upgrade”

Change Exadata Passwords

To change all password inside a Exadata is a lot of manual work. So i wrote a small script! You can find it here. The script should run on the first db node and change all password to the one read from the std in. Continue reading “Change Exadata Passwords”

Exadata storage reconfiguration with empty DGs

Changing the size of your disk groups (DG) is quite easy if the disk groups are empty. if the total amount of space used in all DGs is less then the smallest DG it’s possible to change the size. it’s like playing towers of Hanoi, you must move your data several times. This is not described here. Here you find instructions to change the size with empty DGs. Continue reading “Exadata storage reconfiguration with empty DGs”