Neuromuscular Control Lab FAQ Page

(REKlab)

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Hints

Unix Hints

Emacs Hints

LaTex Hints

Questions

1. How do I stop a printing job?
2. How do I get the previous command in MATLAB?
3. How do I look at the error log?
4. How do I format an new 230Mbyte optical disk?
5. How do I mount/dismount the OP 3.5 Optical disk?
6. How do I mount the CD ROM?
7. How do I get the CD ROM to show lower case file names?
8. What are the common tar commands?

Questions and Answers

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How do I stop a printing job?

The lprm command cancels a print job under your authority.

USAGE: lprm 'jobnumber'

To find the jobs waiting in the printer queue, type lpq

For further information, see man lprm

How do I get the previous command in MATLAB?

If the up arrow key gives you silly responses, (^[0A for example) then type ! and press return. Alternately, type !export EDITOR=emacs to get emacs-type commands on the command line.

How do I look at the error log?

Use the uerf command.

How do I format an new 230Mbyte optical disk?

You must be superuser and following these steps:

1. Erase the current disklable

 disklabel -z /dev/rrz10a 

2. Create a new label for the device (Op 3.5" 230mb disk)

3. # disklabel -rw /dev/rrz10a op35dd 

4. Read the label back to check 2

5. disklabel -r /dev/rrz10a

6. Put a new file system on the disk; Partition c occupies the whole disk and goes from 0 to 446324

7. # newfs /dev/rrz10c 

8. Mount the optical disk:

mount /dev/rz10c mount_point

and it should be loaded and ready for use.

How do do mount/dismount the OP 3.5 Optical disk?

mount /dev/rz10c mount_point
 
umount /dev/rz10c
 

How do I mount the CD ROM?

For ralph:

mount -t cdfs -r /dev/rz4a /cdrom 
 

How do I mount the CD ROM with lower case file names?

Use:
mount -t cdfs -r -o noverson /dev/rz4a /cdrom

Common Tar Commands

To get the index of an archive

tar -ft archive.

To back up a direcotry and subtrees

tar -cfv archive.tar /dir/name

To read all files from an archive

tar -xfv archive.tar