Я пытался установить композитор ..... пытался запустить эту команду
sudo apt install curl php-cli php-mbstring git unzip
на убунту 18.10 .... Я получил это сообщение отображается на cmd
sudo apt install curl php-cli php-mbstring git unzip
Reading package lists... Done
Building dependency tree
Reading state information... Done
unzip is already the newest version (6.0-21ubuntu1).
curl is already the newest version (7.61.0-1ubuntu2.2).
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:
php-mbstring : Depends: php7.2-mbstring but it is not going to be installed
E: Unable to correct problems, you have held broken packages.