I use Ubuntu 16.04 and had done various changed in my system in the last day. I can't exactly show all these processes here but I do ask for an advice on this particular issue, to understand what's going on:
When executing:
sudo apt-get install phpmyadmin
I get:
E: Unable to locate package phpmyadmin
I didn't find any helpful solution on the Web.
Update 1 - Update for Arduino Sentinel:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
phpmyadmin : Depends: php but it is not installable
Depends: php-mbstring
Depends: libjs-sphinxdoc (>= 1.0) but it is not installable
Depends: dbconfig-mysql but it is not installable or
dbconfig-no-thanks but it is not installable or
dbconfig-common (< 2.0.0) but it is not installable
Depends: php-php-gettext but it is not installable or
php-gettext (<= 1:7.0) but it is not installable
Recommends: php-gd
Recommends: php-bz2 but it is not installable
Recommends: php-tcpdf but it is not installable
E: Unable to correct problems, you have held broken packages.
Update 2 - Update for Arduino Sentinel:
Package aptitude is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source