Why do I get this error '/dev/st0: inappropriate ioctl for device'

When I run the command mt -f /dev/st0 status, it produces /dev/st0:inappropriate ioctl for device. How do I fix this issue?

How do I open doc files from command line in linux

Doc files can be opened following default tools.

1. gnome-open
2. oowriter
3. xdg-open


For example:

#gnome-open test.doc
#oowriter test1.doc
#xdg-open test2.doc

How to measure linux performance

Check with dd command in unix/linux systems... for example

#time dd if=/dev/zero of=/dev/null bs=1024k count=10000000
10000000+0 records in
10000000+0 records out
10485760000000 bytes (10 TB) copied, 359.587 seconds, 29.2 GB/s

real    5m59.615s
user    0m4.403s
sys     5m54.958s

#top
#ps

CIFS VFS: cifs_mount failed w/return code = -101

CIFS VFS: Error connecting to socket. Aborting operation
 CIFS VFS: cifs_mount failed w/return code = -101

how to redirect strace to text file

how to redirect strace to text file

#strace -o filename command

For example:

strace -o strace1.txt  ls  

read and edit initrd image contents

1. Make temporary directory

#mkdir /tmp/initrd
2. Copy initrd image to destination directory
#cp /source/directory/initrd-version.img /tmp/initrd
3. unzip and use cpio
#gzip -dc initrd-2.6.18-164.6.1.el5.img | cpio -ivd

blocked FC remote port time out

logs shows 'blocked FC remote port time out' errors