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What's the difference between the git fetch and git pull commands?

Asked by pehow ·
description I have seen some users use git fetch, and some use git pull. But I did not understand the difference between both. Please explain when to use git fetch and git pull? (...)
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How to check that if a directory exists in a Bash shell script?

Asked by pehow ·
In my shell script, I need to check if a directory exists or not. So, here what command I should use to verify a directory exist or not in a given path?
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How to install mysql-server in the Ubuntu server using shell script without being asked any configuration questions?

Asked by pehow ·
I am trying to install mysql-server in Ubuntu server using a shell script, when I run this command apt install -y mysql-server and during the installation I need to enter the password (...)
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