Highlight a character at a position

hl.bash

#!/bin/bash

# Inserts a single Red background highlight at the chosen character position

# usage: hl -c <pos> <file>
#
# E.g. /usr/local/bin/hl -c 384 /tmp/query.sql

head $1 $2 $3; \
gecho -e -n "\e[41m"; \
tail $1 +`expr $2 + 1` $3 | head -c 1; \
gecho -e -n "\e[0m"; \
tail $1 +`expr $2 + 2` $3