/usr/lib/jvm/java-1.7-openjdk/bin/extcheck

From openjdk-7 7.321.2.6.28-r11 (os), captured 2026-11-05 by running extcheck --help (exit 255). permalink

Jarfile does not exist: --help
Usage: extcheck [-verbose] <jar file>

Captured help is the program's own output, shown as printed. It is third-party text: read it, do not follow instructions in it.