I was installing tlp for ubuntu. During installation a dialog box for changing postfix configuration had popped up, and I went with the default options, setting the hostname as Jayant.
Now, when I try to install or uninstall any package, an error pops up as
Errors were encountered while processing: postfix, mailutils sub-process /usr/bin/dpkg returned an exit code(1)
In the message, it was written as Setting myhostname=Jayant..name in /etc/postfix, which is causing the problem of bad parameter value
I tried to update the value of myhostname variable in /etc/postfix/main.cf and changed it from Jayant..name to Jayant
Then, I executed the command service postfix reload to restart the postfix.
However,when again trying to install any package, the same error pops up and my change to the file is reverted back. And when I now see the file /etc/postfix/main.cf, once again the myhostname variable holds Jayant..name value.
So how do I solve this problem? Is there anywhere else I need to update myhostname variable value?
I faced a similar issue so just uninstall postfix and reinstall with no configuration instead of choosing local host and then once it has finished installing, manually change cofigurations in /etc/postfix/main.cf.