Bash shell programming is still very handy. I will provide a quick summary of commands and constructs.
Assigning a Variable and Printing Out Variable
$ cat=Tom
$ echo $cat
Tom
Reading Input Into A Variable
$ read mouse
Jerry
$ echo $mouse
Jerry
Quoting Affects How Variables Get Printed
$ dog="Thomas"
$ echo "$dog"
dog
$ echo '$dog'
$dog
The IF-THEN-ELIF-THEN-ELSE Conditional
if test -f hello.txt
then
...
fi
Also written as:
if [ -f hello.txt ]
then
...
fi
For more information, look up the man page for "test"
if condition
then
...
elif condition
then
...
else
...
fi
The FOR Control Structure
for variable in collection
do
...
done
for item in 1 2 3
do
echo $item
done
To be continued...