Unable to init server: Could not connect: Connection refused regexxer: Cannot open display:

Usage: regexxer [OPTION?] [FOLDER] Help Options: -?, --help Show help options --help-all Show all help options --help-gtk Show GTK+ Options Application Options: -p, --pattern=PATTERN Find files matching PATTERN -R, --no-recursion Do not recurse into subdirectories -h, --hidden Also find hidden files -e, --regex=REGEX Find text matching REGEX -G, --no-global Find only the first match in a line -i, --ignore-case Do case insensitive matching -s, --substitution=STRING Replace matches with STRING -n, --line-number Print match location to standard output -A, --no-autorun Do not automatically start search --display=DISPLAY X display to use