Issue
Trying to interpret what the following script does:
sed -i "0,/ACCOUNT/! {0,/^ACCOUNT/d}" file.txt
My interpretation is that it is trying to delete header rows (the ones that have ACCOUNT as a headername) if found. But running it on test files seems to be leaving the header rows intact.
Solution
The script deletes all lines from the line after the first line containing ACCOUNT up until and including a line starting with ACCOUNT.
Answered By - KamilCuk Answer Checked By - Terry (WPSolving Volunteer)