List of commands I found useful

1. List all files modified in a commit:

   git diff-tree --no-commit-id --name-only -r <COMMIT_HASH>
   

2. Setup git credentials locally.

   To setup your git credentials locally and to avoid having to provide your username and password everytime you pull and push, run

   git config credential.helper store
   

   then do a git pull and provide your username and password

3. Get specific line numbers from a file:

   sed -n '207,208p;370,400p' <FILENAME>
   

   This will return lines 207, 208 and lines 369 through 400

4. Split a comma delimited file and find the unique counts for each value in a given column If input.csv is

   fruit, qty
   apple, 1
   banana, 2
   carrot, 3
   apple, 4
   

   and we want to find the count of fruits, then run

   cat input.csv | awk '{split($0, a, ","); print a[1]}' | sort | uniq -c
   

   The output will be,

   2 apple
   1 banana
   1 carrot
   1 fruit
   

5. awk with an if condition If input.csv is

   fruit, qty
   apple, 1
   banana, 2
   carrot, 3
   apple, 4
   

   and we want to find out which of these fruits have a count more than 1, then

   cat input.csv | awk '{split($0, a, ","); print a[1]}' | sort | uniq -c | awk '{ if ($1 > 1) print $2":"$1}'
   

   The output will be,

   apple:2
   

6. Loop through files in a directory to search for a keyword

   find . -iname "*" -type f | xargs grep "<KEYWORD>"
   

   Alternatively you can use the_silver_searcher.