我的文档查看器无法启动。当我使用命令行打开它时,出现以下错误:
evince
evince: error while loading shared libraries: libffi.so.6: failed to map segment from shared object: Permission denied
当我 sudo 时,它给我以下错误:
sudo evince ass3.pdf
No protocol specified
** (evince:13785): WARNING **: Could not open X display
No protocol specified
error: XDG_RUNTIME_DIR not set in the environment.
Cannot parse arguments: Cannot open display:
如何使其正常打开,通常我的意思是当我用鼠标单击pdf时?