I would like to highlight particular parts of the text using cat. How is this possible?The answer is cat filename | grep wordThanks for the help   
How to highlight words in a text file
highlighting
The answer is, or should be: Not possible.Usage: cat [OPTION]... [FILE]...Concatenate FILE(s) to standard output.With no FILE, or when FILE is -, read standard input.  -A, --show-all           equivalent to -vET  -b, --number-nonblank    number nonempty output lines, overrides -n  -e                       equivalent to -vE  -E, --show-ends          display $ at end of each line  -n, --number             number all output lines  -s, --squeeze-blank      suppress repeated empty output lines  -t                       equivalent to -vT  -T, --show-tabs          display TAB characters as ^I  -u                       (ignored)  -v, --show-nonprinting   use ^ and M- notation, except for LFD and TAB      --help     display this help and exit      --version  output version information and exitExamples:  cat f - g  Output f's contents, then standard input, then g's contents.  cat        Copy standard input to standard output.GNU coreutils online help: <http://www.gnu.org/software/coreutils/>Full documentation at: <http://www.gnu.org/software/coreutils/cat>The 'core' function of cat is to concatenate - literally. in other words - anything that does not concatenate  - or link (things) together - should be considered superfluous