* added echo content * added egrep content * added fgrep content * Update 133-fgrep.md * Update content/roadmaps/102-devops/content/102-managing-servers/101-live-in-terminal/127-echo.md * Update content/roadmaps/102-devops/content/102-managing-servers/101-live-in-terminal/133-fgrep.md Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>