How to write a BASH file correctly?

Question

PHP

I do the same thing all the time

1. ssh -i /var/www/keys/my_key.pem [email protected] (below are the steps already on the server via ssh)
   
2. cd /var/www/
   
3. git fetch
   
4. git reset --hard origin/my_branch
   
5. bash my_bash.sh
   

Questions:
How to write bash.sh that will perform similar actions?
How to set the branch name parameter (my_branch) to execute bash.sh?
How to ssh with a list of commands (2, 3, 4,5) ?
Thank you all for the answers, I already answered the last question myself, maybe it will be useful to someone:

ssh -i /var/www/keys/my_key.pem [email protected] "cd /var/www/ && git fetch && git reset --hard origin/$1 && bash my_bash.sh"

Answer 1

run something like this:sh ./bash.sh my_branch

#!/bin/bash

ssh -i /var/www/keys/my_key.pem -f [email protected]
cd /var/www/
git fetch
git reset --hard origin/$1
bash my_bash.sh

Answer 2

1. Naturally, copy this case to a file with the .sh extension
2. Add the line #!/bin/bash to the beginning
3. Command line options are substituted for $1, $2, $3, and so on.
4. Give the script the right to execute.

Answer 3

cat <<EOF > bash.sh
#!/bin/bash      
# Путь может быть другим -> whereis bash
case "$#" in
0)
# На входе ноль параметров, выполним ссш
ssh -i /var/www/keys/my_key.pem -f [email protected]
         ;;
1)
# На входе 1 параметр, выполним ссш и что-то еще 
ssh -i /var/www/keys/my_key.pem -f [email protected]
cd /var/www/
git fetch
git reset --hard origin/$1
bash my_bash.sh
         ;;
        *)
# На входе хрен пойми что - дай подсказаньку
                echo "Usage:  \"bash ./bash.sh my_branch\" OR \" bash ./bash.sh \" ";
        ;;
esac
EOF

Answer 4

ssh -i /var/www/keys/my_key.pem [email protected] "cd /var/www/ && git fetch && git reset --hard origin/$1 && bash my_bash.sh"

Answer 5

very similar to deploy, I would use ansible