(this post if part of the material I cover in my devops course) About tilde expansion This post is based on the bash tilde expansion documentation. Let's say that you enter several letters, and them the ~ (tilde) character. If non of the letters are quoted, then bash will try to treat these letters as a login name. It …

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(this post if part of the material I cover in my devops course) About Brace Expansions This post is based on the documentation of bash brace expansion. Brace expansion is a mechanism that creates strings The basic syntax is: optional preanble (an opening string) a series of comma-separated strings or a sequence …

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(this post if part of the material I cover in my devops course) Shell Operation Covered here in bash documentation. The shell reads its input from one of these: an input from a file from a string supplied as an argument to the -c invocation option from the user’s terminal Breaks the input into words and operators, …

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(these posts are part of the material I cover in my devops course) Create a demo repository Create a new demo repository in github and clone twice: 1cd ../../a/demo/ 2git clone <your demo repository url> 3cd ../../b/demo/ 4git clone <your demo repository url> Create basic feature1 branch (same in both …

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(these posts are part of the material I cover in my devops course) Create Repositories Go to your github account anc create a public repository. (I have created one called demo) This is just a training session, so you will remove this repository when you're done. Locally, create a working directory (called demowork), …

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(these posts are part of the material I cover in my devops course) Merge Conflicts Preparations Use your previous knowledge to preoare the following: A repository called demo A branch called feature1 with: a file called file.txt The file has 3 lines with the following content (copy and paste exactly these characters): …

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This is a walkthroug. You are going to create a local repository, and do everything needed to push your work to a remote github repository. Create a local repository Create your local repository by typing: 1git init Config git user name and email (these are not github user and email): 1git config --local user.name …

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(these posts are part of the material I cover in my devops course) What is git merge Let's say you work in your local git repository, and you were doing some work in the work branch: 1$> 2$> git branch 3* work 4$> ls 5work1.txt 6$> You want to add something, but you are not sure it is going to be good, so …

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BASH Arrays See here. Indexed arrays 1names[0]=Yoesf 2names[1]=David 3echo $names # will show: Yosef 4echo ${names[1]} # will show: David Assigning complete arrays: 1-> girlz=(Betty Liza Jane) 2-> echo ${girlz[2]} 3Jane 4-> echo ${girlz} 5Betty 6-> Associative Arrays You have to use declare -A name before: …

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Use this tutorial as an intuitive introduction. The go here and read more details. (this post if part of the material I cover in my devops course) Why Branches Our repository from the previous example has 3 commits and 3 files. Let's say that this is a software project, and our code (those 3 files) is good, and we know …

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