screencapture

localhost:~ apple$ screencapture -hscreencapture: illegal option -- husage: screencapture [-icMPmwsWxSCUtoa] [files]  -c         force screen capture to go to the clipboard // 自动截取全屏并且保存到黏贴板  -C         capture the cursor as well as the screen. only in non-interactive modes // 捕获光标以及屏幕  -d         display errors to the user graphically  -i         capture screen interactively, by selection or window               control key - causes screen shot to go to clipboard               space key   - toggle between mouse selection and                             window selection modes               escape key  - cancels interactive screen shot  -m         only capture the main monitor, undefined if -i is set  -M         screen capture output will go to a new Mail message  -o         in window capture mode, do not capture the shadow of the window  -P         screen capture output will open in Preview  -s         only allow mouse selection mode  -S         in window capture mode, capture the screen not the window  -t<format> image format to create, default is png (other options include pdf, jpg, tiff and other formats)  -T<seconds> Take the picture after a delay of <seconds>, default is 5  -w         only allow window selection mode  -W         start interaction in window selection mode  -x         do not play sounds  -a         do not include windows attached to selected windows  -r         do not add dpi meta data to image  -l<windowid> capture this windowsid  -R<x,y,w,h> capture screen rect  -B<bundleid> screen capture output will open in app with bundleidBS  files   where to save the screen capture, 1 file per screen