10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Need a Unix command to save the last 20 versions of a file in a specific directory and delete everything else. Date is irrelevant. Anyone aware of such an animal?
In my test, I came up with:
ls -t1 /tmp/testfile* | tail -n +20 | xargs rm
I don’t quite trust the author though! (1 Reply)
Discussion started by: rwsherman
1 Replies
2. Solaris
unix1{owadmin}% tar tvf /dev/rmt/1
-rw-rw-rw- 1021/10 0 Sep 11 17:54 2011 TinahPF_Far_32bit.segy
tar: directory checksum error
unix1{owadmin}%
i know in this tape 3 files not only one file so what can i do to view 3 files
and what is this error mean ( tar: directory checksum error... (2 Replies)
Discussion started by: ayman
2 Replies
3. Shell Programming and Scripting
Hello
I have the following files
VOICE_hhhh
SUBSCR_llll
DEL_kkkk
Consider that there are 1000 VOICE files+1000 SUBSCR files+1000DEL files
When i try to tar these files using
tar -cvf backup.tar VOICE* SUBSCR* DEL*
i get the error:
ksh: /usr/bin/tar: arg list too long
How can i... (9 Replies)
Discussion started by: chriss_58
9 Replies
4. Shell Programming and Scripting
Hello I'm trying to do an exercise programming in bash where I have to get only the store of files in a directory but NOT all capacity of the directory.
I probe with: du -sh "$directory"*` but I get all the capacity and I probe with ls command but I couldnt.
Are there any way to get only files... (2 Replies)
Discussion started by: adiegorpc
2 Replies
5. AIX
Hi, what happened is we want to count all the files in a directory and inside this directory got many folders and so take long time to count it. Already run for about few minutes but still not done. The command we use to count is find . -type f | wc -l
Just wondering if there is any other... (9 Replies)
Discussion started by: ngaisteve1
9 Replies
6. Filesystems, Disks and Memory
I've starting playing with a tape drive for the first time. Its a new one, an IBM Ultrium LTO 4. After initially copying a file to the tape with tar cvf /dev/st0 /root/dummy, all subsequent files appended take an increasing amount of time with tar rvf /dev/st0 /root/dummyX. Is it normal for each... (2 Replies)
Discussion started by: jeriryan87
2 Replies
7. UNIX for Dummies Questions & Answers
Hi all,
I have kinda inherited this problem, but was wondering if anyone else had any ideas.
Currently all our backup rentention periods are set to 2 weeks, so that we can cycle through tapes (save money etc...). Anyhow the guys next door in IT, decided one day long long ago, that it would... (0 Replies)
Discussion started by: B14speedfreak
0 Replies
8. Shell Programming and Scripting
I did search the posts for info on this and while there were some in the ballpark, none addressed this specifically. (also I tried to post this once it said I was logged out, so hopefully I'm not sending a duplicate here).
I have a set of files (250 +/-) where I need to delete the first "$x"... (4 Replies)
Discussion started by: benair
4 Replies
9. AIX
I have AIX5.1
I have tried to retrieve a file from tape with no sucsess. I had this posted in the newbies section but I think I should have tried here. I did get some good info there though on where to start. This Is what I did.
My back line is so...
cat /rd/tmp/backuplist.full | cpio -ocvBdum... (1 Reply)
Discussion started by: rocker40
1 Replies
10. UNIX for Dummies Questions & Answers
Can anyone please help....
how can I dump just a single file to tape using the ufsrestore command!!! I'm a newbie to unix and It's driving me mad..
Thanks in advance. (2 Replies)
Discussion started by: Jonathan
2 Replies
mt(1) General Commands Manual mt(1)
Name
mt - magnetic tape manipulating program
Syntax
mt [-f tapename] command [count]
Description
The command permits the operation of a magnetic tape drive.
Options
The -f flag option uses the specified tape device (next argument) in place of either that tape device defined by your TAPE environment
variable (.login or .profile) or /dev/nrmt0h.
Some operations may be performed multiple times by specifying count. By default, performs the requested operation once.
The command argument defines the operation to be performed. Only as many characters as are required to uniquely identify a command need be
specified.
The following is a list of commands:
bsf Backspace count files.
bsr Backspace count records.
cache Allows to use the cache buffer on a tape drive that has the cache buffer feature.
clhrdsf Clear hardware/software problem. Works with tape drives which use the TMSCP tape controller interface This command is
restricted to root access only.
clserex Clear serious exception. Works with tape drives which use the TMSCP tape controller interface
clsub Clear subsystem. Works with tape drives which use the TMSCP tape controller interface This command is restricted to
root access only.
eof, weof Write count end-of-file marks at the current position on the tape.
eotdis Disable end-of-tape detection. When the end of tape is reached, the tape will run off the reel. Only the superuser
can issue this command. The command remains in effect for the device until end-of-tape detection is enabled with the
eoten command.
eoten Enable end-of-tape detection. When the end-of-tape markers are reached, the tape is halted on the reel, between the
two end-of-tape markers. Only the superuser can issue this command. The command remains in effect for the device
until end-of-tape detection is disabled with the eotdis command. This is the default mode after a system boot.
fsf Forward-space count files.
fsr Forward-space count records.
nocache Disables the use of the cache buffer for any tape drive that has the cache buffer feature.
offline, rewoffl Rewind the tape and place the tape unit off-line.
retension Retensions the tape. Retension means moving the tape one complete pass between EOT and BOT.
rewind Rewind the tape.
status Print status information about the tape unit.
Examples
This example shows how to rewind the tape
mt -f /dev/rmt0l rewind
This example shows how to backspace the tape nmt1h three files:
mt -f /dev/nrmt1h bsf 3
This example shows how to write two end-of-file marks at the current position on tape nmt6h:
mt -f /dev/nrmt6h eof 2
Return Values
In shell scripts, returns a 0 exit status when the operation(s) were successful, 1 if the command was unrecognized, and 2 if an operation
failed.
Files
/dev/rmt?h or /dev/rmt?l
Raw magnetic tape interface with rewind when closed
/dev/nmt?h or /dev/nmt?l
Raw magnetic tape interface with no rewind when closed
See Also
dd(1), tar(1), ioctl(2), mtio(4), tms(4), environ(7)
mt(1)