I am trying to read a file and split the file into multiple files. I need to create new files with different set of lines from the original file. ie, the first output file may contain 10 lines and the second 100 lines and so on. The criteria is to get the lines between two lines starting with some... (8 Replies)
I have gone through all the threads in the forum and tested out different things. I am trying to split a 3GB file into multiple files. Some files are even larger than this.
For example:
split -l 3000000 filename.txt
This is very slow and it splits the file with 3 million records in each... (10 Replies)
I did a lot of search on this forum on spiting file; found a lot, but my requirement is a bit different, please guide.
Master file:
x:start:5
line1:23
line2:12
2:90
x:end:5
x:start:2
45:56
22:90
x:end:2
x:start:3
line1:23
line2:12
x:end:3
x:start:2
line5:23 (1 Reply)
Hi ,
I just need to split a file and outputfiles are redirected to gzip file
need:
Input file - A.gz
content of A.gz is
100|sfdds|dffdds|200112|sdfdf
100|sfdds|dffdds|200112|sdfdf
100|sfdds|dffdds|200112|sdfdf
100|sfdds|dffdds|200212|sdfdf
100|sfdds|dffdds|200212|sdfdf... (3 Replies)
Hello,
I have a file like the following:
david,a,b,c,20,r
thomas,a,b,c,30,r
willaiam,a,b,c,80,r
barbara,a,b,c,100,r
I would like to split the file into other files using a condition for the contents of column 5.
The condition should be a if the contents of column 5 is in a range... (4 Replies)
Hi All,
Input.txt
XYZONEABC
CZXTWOJJJ
KKKSIXOOO
asdfhajlsdhfajs
asdfasfasdf
Output Files:
ONE.txt
XYZONEABC
TWO.txt
CZXTWOJJJ
SIX.txt
KKKSIXOOO
I had a script (2 Replies)
Hi!
I have a file like this:
a,b,c,12,d,e
a,b,c,13,d,e
a,b,c,14,d,e
a,b,c,15,d,e
a,b,c,16,d,e
a,b,c,17,d,e
I need to split that file in two:
If field 4 is equal or higher than 14 that row goes to one file and if it is equal or higher than 15 to another.
Can anyone point me in the... (2 Replies)
Hi all,
I'm pretty new to Shell scripting and I need some help to split a source text file into multiple files. The source has a row with pattern where the file needs to be split, and the pattern row also contains the file name of the destination for that specific piece. Here is an example:
... (2 Replies)
I need to split the incoming source file in to multiple files using awk.
Split position is (6,13) : 8 positions
All the records that are greater than 20170101 and less than or equal to 20181231 should go in a split file with file name as source... (11 Replies)
Discussion started by: rosebud123
11 Replies
LEARN ABOUT V7
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)