In Unix and operating systems inspired by it, the file system is considered a central component of the operating system. It was also one of the first parts of the system to be designed and implemented by Ken Thompson in the first experimental version of Unix, dated 1969.
Like in other operating systems, the filesystem provides information storage and retrieval, as well as interprocess communication, in the sense that the many small programs that traditionally comprise a Unix system can store information in files so that other programs can read these, although pipes complemented it in this role starting with the Third Edition. Additionally, the filesystem provides access to other resources through so-called device files that are entry points to terminals, printers, and mice.
The rest of this article uses "Unix" as a generic name to refer to both the original Unix operating system as well as its many workalikes.
The filesystem appears as a single rooted tree of directories. Instead of addressing separate volumes such as disk partitions, removable media, and network shares as separate trees (as done in MS-DOS and Windows: each "drive" has a drive letter that denotes the root of its file system tree), such volumes can be "mounted" on a directory, causing the volume's file system tree to appear as that directory in the larger tree. The root of the entire tree is denoted /
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USR may refer to:
Oh, yeah
Alright
Somebody's Heine' is crowdin' my icebox
Somebody's cold one is givin' me chills
Guess I'll just close my eyes
Oh yeah, all right, feels good inside
Flip on the tele'
Wrestle with Jimmy
Something is bubbling behind my back
The bottle is ready to blow
Say it ain't so
Your drug is a heart-breaker
Say it ain't so
My love is a life-taker
I can't confront you, I never could do
That which might hurt you so try and be cool
When I say, "This way is a water slide away from me
That takes you further every day, hey, so be cool"
Say it ain't so
Your drug is a heart-breaker
Say it ain't so
My love is a life-taker
Dear Daddy, I write you, in spite of years of silence
You've cleaned up, found Jesus, things are good or so I hear
This bottle of Steven's awakens ancient feelings
Like father, step-father, the son is drowning in the flood
Yeah, yeah yeah, yeah yeah
Say it ain't so
Your drug is a heart-breaker
Say it ain't so