関連ワード:  linux is multiuser operating system    linux is multitasking operating system    linux is multitasking operating system true or false    linux is a multi user multitasking operating system    linux is multi user operating system true or false    linux is an example of multi user operating system    linux is single user or multi user operating system    linux is an open source multi user operating system    linux is a multi tasking and multi user operating system    linux is multiuser or single user