Which bash command will print all lines from the "colors.txt" file containing the non case-sensitive pattern "Yellow"?

The grep -i flag enables case-insensitive matching, so 'grep -i "yellow" colors.txt' will match and print lines containing 'yellow', 'Yellow', 'YELLOW', or any mixed-case variant from the file colors.txt. The -i flag is the standard POSIX grep option for case-insensitive content search.

The locate command searches the file system index for files matching a name pattern and does not search within file contents.

locate does not support a -i flag for content searching and does not read file contents - it only locates files by name in the system database.

grep without -i performs a case-sensitive match, so 'grep "Yellow"' would only match lines with that exact capitalization and would miss 'yellow' or 'YELLOW'.