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Hi,
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Hi ,
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..
.
.
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I have read the below from the book bash cookbook.Tail +1 filenames is similar to cat filename
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Hi,
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abcdefghijkl
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.....
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Function: int fcntl(int fd, int cmd, struct flock * lock)
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I want to read a file from a specified offset from the start of file. With the read command, is it possible to do so. Please suggest. Is there any other alternative?
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Saurabh (2 Replies)
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Hello all,
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WIPEFS(8) MAINTENANCE COMMANDS WIPEFS(8)
NAME
wipefs - wipe a filesystem signature from a device
SYNOPSIS
wipefs [-ahnp] [-o offset] device
DESCRIPTION
wipefs allows to erase filesystem or raid signatures (magic strings) from the device to make the filesystem invisible for libblkid. wipefs
does not erase the whole filesystem or any other data from the device. When used without options -a or -o, it lists all visible filesys-
tems and offsets of their signatures.
OPTIONS
-a, --all
Erase all available signatures.
-h, --help
Print help and exit.
-n, --no-act
Causes everything to be done except for the write() call.
-o, --offset offset
Specifies location (in bytes) of the signature which should be erased from the device. The offset number may include a "0x" prefix,
and then the number will be read as a hex value. It is possible to specify multiple -o options.
The offset argument may be followed by binary (2^N) suffixes KiB, MiB, GiB, TiB, PiB and EiB (the "iB" is optional, e.g. "K" has the
same meaning as "KiB") or decimal (10^N) suffixes KB, MB, GB, PB and EB.
-p, --parsable
Print out in parsable instead of printable format. Encode all potentially unsafe characters of a string to the corresponding hex
value prefixed by 'x'.
AUTHOR
Karel Zak <kzak@redhat.com>.
AVAILABILITY
The wipefs command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
SEE ALSO
blkid(8) findfs(8)
Linux October 2009 WIPEFS(8)