File:  [MW Coherent from dump] / coherent / a / etc / coh_intro
Revision 1.1.1.1 (vendor branch): download - view: text, annotated - select for diffs
Wed May 29 04:56:33 2019 UTC (7 years, 2 months ago) by root
Branches: MarkWilliams, MAIN
CVS tags: relic, HEAD
coherent

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1.5PAGERexec more -dWould you like an introductory tour of COHERENTlc %s | %slc %s

When you boot your computer system (by turning on the power,
by hitting the reset switch, or by typing <Ctrl><Alt><Del>),
the bootstrap program by default runs the operating system on
the partition marked as active.  To boot an operating system
system on a different partition, type a partition number (0 to 7)
when the boot tries to read the floppy disk.

When you boot COHERENT, it starts up in single-user mode.
It automatically executes the commands in the file /etc/brc,
which typically check COHERENT filesystems for consistency
using /etc/fsck.  If the filesystems check without errors,
the system goes into multi-user mode, automatically executing
the commands in the file /etc/rc.  You can interrupt file system
checking by typing <Ctrl-C>.

To shut down COHERENT from multi-user mode, log in as root and
execute /etc/shutdown to return the system to single-user mode.
Then type sync before rebooting or turning off the power.
Your COHERENT filesystems may be damaged if you reboot or
power down without following this procedure.

/Now we will take a quick tour of your COHERENT filesystem.
The root directory / contains:


COHERENT executes file /.profile when the superuser root logs in.
File /coherent (linked to /autoboot) is the COHERENT system image.
Empty directories /f0 and /f1 are used for mounting diskettes.
Empty directory /mnt is used for mounting other devices.
The filesystem checking program /etc/fsck uses empty directory
/lost+found if it finds a problem with the root filesystem.
COHERENT uses directory /tmp for temporary files; it removes files
in /tmp automatically when the system goes multiuser (via /etc/rc).

Directory /bin contains executable programs (commands).
Some of the most commonly used commands are:
	bc	interactive calculator with arbitrary precision
	cat	concatenate/print files
	cc	C compiler
	cmp	compare files
	cp	copy files
	cpdir	copy directory hierarchy
	diff	summarize differences between files
	dos	transfer files to or from MS-DOS
	ed	interactive line-oriented text editor
	egrep	extended pattern search
	help	print concise command description
	lc	categorize files in a directory
	ls	list directory contents
	mail	computer mail
	ps	print process status
	rm	remove files
	rmdir	remove directories
	scat	segmented concatenation
	sort	sort lines of text
	wc	count words, lines, characters in a file
The next screen lists all the commands in /bin.
/bin/confDirectory /conf contains:

/conf/kbdSubdirectory /conf/kbd contains keyboard support:


You can change the operation of various keys on your keyboard by changing
the appropriate file in /conf/kbd and running /etc/kbdinstall.
/devDirectory /dev contains COHERENT devices:

Some important devices are:
	/dev/at*	Cooked (block-by-block) hard disk partitions
	/dev/com*	Serial port devices (COM1, COM2, COM3, COM4)
	/dev/console	Console terminal
	/dev/f*		Floppy disk devices
	/dev/lpt*	Parallel port devices (LPT1, LPT2 and LPT3)
	/dev/null	Bit bucket
	/dev/rat*	Raw (character-by-character) hard disk partitions
	/dev/rf*	Raw (character-by-character) floppy disk devices

/drvDirectory /drv contains loadable device drivers:

/etcDirectory /etc contains files and programs used in system administration:

Files of particular interest in /etc include:
	/etc/brc	Executed when the system comes up single-user
	/etc/group	Defines user group membership information
	/etc/passwd	Defines user login information
	/etc/profile	Executed for each shell
	/etc/rc		Executed when the system comes up multi-user
	/etc/ttys	Defines status of terminals attached to system

/libDirectory /lib contains libraries and C compiler phases:

/usrDirectory /usr contains a number of subdirectories:


	/usr/adm	System administration files
	/usr/bin	Additional COHERENT commands
	/usr/dict	Dictionary for spell command
	/usr/games	Games
	/usr/include	Header files
	/usr/lib	Additional libraries
	/usr/man	COHERENT online manual pages
	/usr/msgs	System-wide messages
	/usr/pub	Public information
	/usr/spool	Work area for daemon processes
	/usr/src	Some sources and sample programs
	/usr/tmp	Temporary file directory

COHERENT filenames often contain an extension following '.' which
indicates the contents of the file.  Some common extensions are:

	.a	archive (or library) in ar format
	.b	bc source
	.c	C source
	.h	C header
	.i	C intermediate file (cpp output)
	.l	lex source
	.m	macro assembler source
	.o	object file (unlinked)
	.r	nroff or troff input
	.s	assembler source
	.tar	archive in tar format
	.tar.Z	compressed tar-format archive, cf. tar, compress
	.tmp	temporary file
	.y	yacc source
	.Z	compressed file, cf. compress/uncompress

Some commonly used diskette device names and formats are:
	Device name  Sectors/track  Heads  Sectors  Bytes   Format
	/dev/f9a0          9          2      720    360 KB   5.25"
	/dev/fqa0          9          2     1440    720 KB   3.5"
	/dev/fha0         15          2     2400    1.2 MB   5.25"
	/dev/fva0         18          2     2880    1.44 MB  3.5"
Device names ending in '0' and '1' indicate drives A: and B:.

To use a floppy disk with COHERENT, you must:
	(1) format it with /etc/fdformat,
	(2) check it for bad blocks with /etc/badscan,
	(3) build an empty filesystem on it with /etc/mkfs,
	(4) mount it with /bin/mount or /etc/mount,
	(5) copy files to or from it, e.g. with /bin/cp or /bin/cpdir,
and	(6) unmount it with /bin/umount or /etc/umount.

For example, to copy directory /dir to a 5.25" high density diskette in A:
	/etc/fdformat /dev/fha0
	/etc/badscan -o /tmp/proto /dev/fha0 2400
	/etc/mkfs /dev/fha0 /tmp/proto
	/etc/mount /dev/fha0 /f0
	cpdir -vd /dir /f0/dir
	/etc/umount /dev/fha0
/bin/mount and /bin/umount provide handy abbreviations for mount commands.

This concludes your brief introduction to COHERENT.
To see this introduction again, type "/etc/coh_intro".
To create a file with this information, type "/etc/coh_intro >/tmp/tour".

Hit <Enter> to continue...%s: %r
Installation aborted before completion.
%rEnter a value between %d and %d:%r %s: %r
Hit <Enter> to continue...%s
command "%s" failedcommand "%s" failed%r [y or n]?/bin/shsh-c@@@@@@@@@PPPPP@@@@@@@@@@@@@@@@@@�                      						      





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