====== Replace characters in very large files ======

We can use the sed command. \\ 

Example - replace "" with ":
<code>
sed -i 's/""/"/g' sample.csv
</code>

Get rid of all ":
<code>
sed -i 's/"//g' sample.csv
</code>

Get rid of " on the **first line only**:
<code>
sed -i '1s/"//g' sample.csv
</code>