Hi all,
I have a field in the line, let's say argument $6, which is in the format 00.00
If i want to split the field to get rid of the "." in between of the amount, how can i do that i awk script?
I have it like this
split($6,a,".")
but it will get rid of the last 2 digits after the... (4 Replies)
Hello
I have a file which is pipe delimited.
The 4 th field has value like 200704 or 200705 etc.
Now i have to get only those records where 4th field is 200704
How can i do this?
I have to get the whole record where 4th field = 200704 (4 Replies)
Hello
I have a file which is pipe delimited.
The 4 th field has value like 200704 or 200705 etc.
Now i have to get only those records where 4th field is 200704
How can i do this?
I have to get the whole record where 4th field = 200704 (7 Replies)
Hello, maybe this post is offtopic, sorry for the inconveniencies (maybe should be in the forum with questions about C, C++, Java, SQL...).
I found examples about how to populate different fields from a text file (with MySQL, the LOAD DATA INFILE sentece), but not about how to load a complete... (2 Replies)
Hi
I have a large file 2.6 million records and I am trying to split the file based on last column.
I am doing
awk -F"|" '{ print > $NF }' filename1
After around 1000 splits it gives me a error
awk: can't open file 3332332423
input record number 1068, file filename1
source... (6 Replies)
Hi Experts,
I have a Input.txt document which contains data fields seperated by tabs. There are 4 fields totally Named UNIQUE, ORDER, CONTACT and WINS. The UNIQUE field contains unique ID and the CONTACT field contains data seperated by comma in some records. I am looking to write an awk script... (12 Replies)
Hi,
I have file: data.log.1
### s1
main.build.3495
main.build.199
main.build.3408
###s2
main.build.3495
main.build.3408
main.build.199
I want to read this file and store in two arrays in Perl.
I have following command, which is working fine on command prompt.
perl -n -e... (1 Reply)
Hi all
I have written Perl script to swap the strings in the second a third column from a text file.
My input file format is :
the|empty|the|det lake|empty|lake|conj_and was|empty|was|auxpass drained|empty|drained|conj_and birds|empty|bird|s|nn
The expected output file format is... (11 Replies)
Hi, I have a file like this:
aaa 123
aaa 223
aaa 225
bbb 332
bbb 423
bbb 6755
bbb 324
ccc 112
ccc 234
ccc 897
Which I need to split into several files, something like
split -l 3
but the way that the lines with the same names would only go into one file: (7 Replies)
I have a perl script which splits a large file into chunks.The script is given below
use strict;
use warnings;
open (FH, "<monolingual.txt") or die "Could not open source file. $!";
my $i = 0;
while (1) {
my $chunk;
print "process part $i\n";
open(OUT, ">part$i.log") or die "Could... (4 Replies)
Discussion started by: gimley
4 Replies
LEARN ABOUT BSD
ram
RAM(4) Kernel Interfaces Manual RAM(4)NAME
ram - ram disk driver
SYNOPSIS
/sys/conf/SYSTEM:
NRAM ram_size # RAM disk size (512-byte blocks)
major device number(s):
block: 3
minor device encoding:
must be zero (0)
DESCRIPTION
The ram pseudo-device provides a very fast extended memory store. It's use is intended for file systems like /tmp and applications which
need to access a reasonably large amount of data quickly.
The amount of memory dedicated to the ram device is controlled by the NRAM definition in units of 512-byte blocks. This is also patchable
in the system binary through the variable ram_size (though a patched system would have to be rebooted before any change took effect; see
adb(1)). This makes it easy to test the effects of different ram disk sizes on system performance. It's important to note that any space
given to the ram device is permanently allocated at system boot time. Dedicating too much memory can adversely affect system performance
by forcing the system to swap heavily as in a memory poor environment.
The block file accesses the ram disk via the system's buffering mechanism through a buffer sharing arrangement with the buffer cache. It
may be read and written without regard to physical disk records. There is no `raw' interface since no speed advantage is gained by such an
interface with the ram disk.
DISK SUPPORT
The ram driver does not support pseudo-disks (partitions). The special files refer to the entire `drive' as a single sequentially
addressed file.
A typical use for the ram disk would be to mount /tmp on it. Note that if this arrangement is recorded in /etc/fstab then /etc/rc will
have to be modified slightly to do a mkfs(8) on the ram disk before the standard file system checks are done.
FILES
/dev/ram block file
/dev/MAKEDEV script to create special files
/dev/MAKEDEV.local script to localize special files
SEE ALSO hk(4), ra(4), rl(4), rk(4), rp(4), rx(4), si(4), xp(4)dtab(5), autoconfig(8)DIAGNOSTICS
ram: no space. There is not enough memory to allocate the space needed by the ram disk. The ram disk is disabled. Any attempts to access
it will return an error.
ram: not allocated. No memory was allocated to the ram disk and an attempt was made to open it. Either not enough memory was available at
boot time or the kernel variable ram_size was set to zero.
BUGS
The ram driver is only available under 2.11BSD.
3rd Berkeley Distribution Januray 27, 1996 RAM(4)