02-19-2008
split -l is the best options, do a man on split and read the -l option.
The following options are supported:
-linecount | -l linecount
Number of lines in each piece. Defaults to 1000 lines.
1) wc filename ( one you know the total # of lines you can decide on splitting them in either 2 or 2 or n number of smaller files.
For example if your file has 100000 lines
split -l 50000 filename will give you two file xaa and xab with 50000 lines each.
if you do
split -l 20000 filename it will give you xaa, xab , xac, xad, xae files with exactly 20000 lines in each file.
I hope this helps.
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I want to compare some files.
say iam having 2 sets of files ,each is having some 10 files.
ie,
file1
1a.txt
1b.txt
1c.txt
...
file2
2a.txt
2b.txt
2c.txt
...
i need to read line by line of this files parralley..
ie.. i want to read file1 first line that is 1a.txt and file2... (2 Replies)
Discussion started by: nivas
2 Replies
2. Shell Programming and Scripting
Hi,
Iam having file1 as follows:
ERTYUIOU|1234567689089767688
FDHJHKJH|6817738971783893499
JFKDKLLUI|9080986766433498444
FILE2
ERTYUIOU|1234567689089767688 resh@abc_com 767637218328322332 893589893499 asdsddssd ... (21 Replies)
Discussion started by: nivas
21 Replies
3. Shell Programming and Scripting
Hi,
Iam having the files as follows:
file1
aa
aa
aa
aa
ab
ac
ad
ae
file2
aa
aa
ab
Outputfile: (20 Replies)
Discussion started by: nivas
20 Replies
4. Infrastructure Monitoring
# set date to your spec: this is month/day/yr/hr/min/sec:
sysdate=`date '+%m/%d/%Y-%H:%M:%S'`
# get the last line before the history file is modified
tail -1 /tmp/hosthistory.txt |while read lastdate mydevices
do
echo $lastdate
echo $mydevices
done
LIST = 'ypcat hosts|| sort... (11 Replies)
Discussion started by: lemseffert
11 Replies
5. Shell Programming and Scripting
Hi All,
How do I code a password with multiple special characters in it.
Example: password is P#utar&@
None of the belwo options worked
1. passwd="P#utar&@"
2. passwd='P#utar&@'
Any help will be greatly appreciated. (3 Replies)
Discussion started by: afredri
3 Replies
6. Shell Programming and Scripting
RCS file: /home/rcap/.APCVS/regs/rc/power/analysis/pow_rtl/renes_setup.g,v
Working file: ./power/analysis/pow_rtl/renes_setup.g
head: 1.14
branch:
locks: strict
access list:
symbolic names:
br_2010_101_200: 1.13.0.12
br_2010_101_100: 1.13.0.10
br_2009_91_200:... (3 Replies)
Discussion started by: harjinder
3 Replies
7. Shell Programming and Scripting
I was trying out some new series to get it print
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
and the seond one is
1
2 2
3 3 3
4 4 4 4
5 5 5 5 5
but was unable to get the result. (5 Replies)
Discussion started by: harjinder
5 Replies
8. Shell Programming and Scripting
hi,
i am trying this while loop and i only want that it should only read food as pizza....no other entry should be taken here.
#!/usr/bin/perl -w
$food = " ";
while ( $food ne 'pizza' )
{
print 'enter what you had last night: ';
chomp ($food = <STDIN>);
#print $food ;
}
... (2 Replies)
Discussion started by: kullu
2 Replies
9. UNIX for Dummies Questions & Answers
sxsaaas (3 Replies)
Discussion started by: VikrantD
3 Replies
LEARN ABOUT FREEBSD
split
SPLIT(1) BSD General Commands Manual SPLIT(1)
NAME
split -- split a file into pieces
SYNOPSIS
split -d [-l line_count] [-a suffix_length] [file [prefix]]
split -d -b byte_count[K|k|M|m|G|g] [-a suffix_length] [file [prefix]]
split -d -n chunk_count [-a suffix_length] [file [prefix]]
split -d -p pattern [-a suffix_length] [file [prefix]]
DESCRIPTION
The split utility reads the given file and breaks it up into files of 1000 lines each (if no options are specified), leaving the file
unchanged. If file is a single dash ('-') or absent, split reads from the standard input.
The options are as follows:
-a suffix_length
Use suffix_length letters to form the suffix of the file name.
-b byte_count[K|k|M|m|G|g]
Create split files byte_count bytes in length. If k or K is appended to the number, the file is split into byte_count kilobyte
pieces. If m or M is appended to the number, the file is split into byte_count megabyte pieces. If g or G is appended to the num-
ber, the file is split into byte_count gigabyte pieces.
-d Use a numeric suffix instead of a alphabetic suffix.
-l line_count
Create split files line_count lines in length.
-n chunk_count
Split file into chunk_count smaller files.
-p pattern
The file is split whenever an input line matches pattern, which is interpreted as an extended regular expression. The matching line
will be the first line of the next output file. This option is incompatible with the -b and -l options.
If additional arguments are specified, the first is used as the name of the input file which is to be split. If a second additional argument
is specified, it is used as a prefix for the names of the files into which the file is split. In this case, each file into which the file is
split is named by the prefix followed by a lexically ordered suffix using suffix_length characters in the range ``a-z''. If -a is not speci-
fied, two letters are used as the suffix.
If the prefix argument is not specified, the file is split into lexically ordered files named with the prefix ``x'' and with suffixes as
above.
ENVIRONMENT
The LANG, LC_ALL, LC_CTYPE and LC_COLLATE environment variables affect the execution of split as described in environ(7).
EXIT STATUS
The split utility exits 0 on success, and >0 if an error occurs.
SEE ALSO
csplit(1), re_format(7)
STANDARDS
The split utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'').
HISTORY
A split command appeared in Version 3 AT&T UNIX.
BUGS
The maximum line length for matching patterns is 65536.
BSD
May 9, 2013 BSD