Ok, lets suppose I have two files like so:
file1
John 5441223
Sandy 113446
Jill 489799
file2
Sandy Tuesday
Jill Friday
John Monday
Is it possible to match records from these two files and output them into one output file? For example, lets suppose I want to output like this:
... (5 Replies)
I have information in a file called HITS. This file has been populated by the user entering search criteria.
the HITS file contains information:
filname.hits: 123.33.345.66 Fri Nov 26 11.45.56.43 GMT 2006
at the moment i am just displayin the information using cat HITS.
... (3 Replies)
Hi!
I am a newbie to Unix. I was writing a little game program for fun when thought of an idea to allow data to be saved. I knew to take all of the Predefined variables and put them into a separate file, then including the file in the program. But I am having trouble making it so that the user... (0 Replies)
Hi everyone. I realise this is probably a bit of a noob question, but I'm actually a C# developer working on a legacy system, and can't remember much unix.
I want to read from a pipe-delimeted file like formatted thusly:
idno|PRODUCT|Name|street town postcode|etc|etc|etc|etc... (4 Replies)
Stuck on formatting an output. I want to list 6-99 on the screen, looking something like this:
99 98 97 96 95 94 93 92 91 90
89 88 87 86 85 84 83 82 81 80
and so on down to 6.
So far I am only able to print one value per line.
This is what I have
I have defined x as integer x=99... (2 Replies)
I need to enable set -x in my croned script as at times the script is not returning all data that it should be. This only happens intermittently and as such I would like a means of being able to check what goes wrong.
My question is how to output the debug of set -x to file? (1 Reply)
Hi Everyone,
Long time lurker here. I have a project of bringing every one of our data centers to a newly enforced company standard. Standard naming conventions, domain migrations, etc. So, the people who are setting the standards are providing me with a CSV file. Column 1 has the old... (23 Replies)
Hi all,
This is my first ever posting, so please be gentle with me :)
I'm trying to write a script in HP-UX which outputs text in different colours, but although I can get the script to output different colours to the screen, I can't get it to write different colours to a file. Take the... (4 Replies)
Discussion started by: neilharvey
4 Replies
LEARN ABOUT XFREE86
raw
RAW(8) System Administration RAW(8)NAME
raw - bind a Linux raw character device
SYNOPSIS
raw /dev/raw/raw<N> <major> <minor>
raw /dev/raw/raw<N> /dev/<blockdev>
raw -q /dev/raw/raw<N>
raw -qa
DESCRIPTION
raw is used to bind a Linux raw character device to a block device. Any block device may be used: at the time of binding, the device
driver does not even have to be accessible (it may be loaded on demand as a kernel module later).
raw is used in two modes: it either sets raw device bindings, or it queries existing bindings. When setting a raw device, /dev/raw/raw<N>
is the device name of an existing raw device node in the filesystem. The block device to which it is to be bound can be specified either
in terms of its major and minor device numbers, or as a path name /dev/<blockdev> to an existing block device file.
The bindings already in existence can be queried with the -q option, which is used either with a raw device filename to query that one
device, or with the -a option to query all bound raw devices.
Unbinding can be done by specifying major and minor 0.
Once bound to a block device, a raw device can be opened, read and written, just like the block device it is bound to. However, the raw
device does not behave exactly like the block device. In particular, access to the raw device bypasses the kernel's block buffer cache
entirely: all I/O is done directly to and from the address space of the process performing the I/O. If the underlying block device driver
can support DMA, then no data copying at all is required to complete the I/O.
Because raw I/O involves direct hardware access to a process's memory, a few extra restrictions must be observed. All I/Os must be cor-
rectly aligned in memory and on disk: they must start at a sector offset on disk, they must be an exact number of sectors long, and the
data buffer in virtual memory must also be aligned to a multiple of the sector size. The sector size is 512 bytes for most devices.
OPTIONS -q, --query
Set query mode. raw will query an existing binding instead of setting a new one.
-a, --all
With -q , specify that all bound raw devices should be queried.
-h, --help
Display help text and exit.
-V, --version
Display version information and exit.
BUGS
The Linux dd(1) command should be used without the bs= option, or the blocksize needs to be a multiple of the sector size of the device
(512 bytes usually), otherwise it will fail with "Invalid Argument" messages (EINVAL).
Raw I/O devices do not maintain cache coherency with the Linux block device buffer cache. If you use raw I/O to overwrite data already in
the buffer cache, the buffer cache will no longer correspond to the contents of the actual storage device underneath. This is deliberate,
but is regarded either a bug or a feature depending on who you ask!
NOTES
Rather than using raw devices applications should prefer open(2) devices, such as /dev/sda1, with the O_DIRECT flag.
AUTHOR
Stephen Tweedie (sct@redhat.com)
AVAILABILITY
The raw command is part of the util-linux package and is available from https://www.kernel.org/pub/linux/utils/util-linux/.
util-linux August 1999 RAW(8)