I have tried a few codes. But these codes involved separate commands
To generate the first output file:
To generate the second output file:
To generate the third output file:
Is there any improved one-liner commands to generate the above output files?
Thanks.
---------- Post updated at 04:48 AM ---------- Previous update was at 04:46 AM ----------
Quote:
Originally Posted by Don Cragun
Is this a homework assignment?
This is not an assignment. I am learning linux by myself. I thought that I might face the similar situation in the future. I have come out with a few solutions. But they are rather complicated.
Hi All,
I am new to unix scripting, please help me in solving this assignment..
I have a scenario, as follows:
1. i have a text file(read1.txt) with the following data
sairam,123
kamal,122
etc..
2. I have to write a unix... (6 Replies)
Im writing a KSH script to read a simple text file and add a delimiter. Ive written the following script but it runs very slow. I initially used the cut command to substring the input record then switched to this version using awk to substring... both run too slow. Any ideas how to make this more... (2 Replies)
I’m new to Linux script and not sure how to filter out bad records from huge flat files (over 1.3GB each). The delimiter is a semi colon “;”
Here is the sample of 5 lines in the file:
Name1;phone1;address1;city1;state1;zipcode1
Name2;phone2;address2;city2;state2;zipcode2;comment... (7 Replies)
Hello,
I want to split a big file into smaller ones with certain "counts". I am aware this type of job has been asked quite often, but I posted again when I came to csplit, which may be simpler to solve the problem.
Input file (fasta format):
>seq1
agtcagtc
agtcagtc
ag
>seq2
agtcagtcagtc... (8 Replies)
Hi,
I have a No Delimiter variable length text file with following schema -
Column Name Data length
Firstname 5
Lastname 5
age 3
phoneno1 10
phoneno2 10
phoneno3 10
sample data - ... (16 Replies)
Hi,
I have a file which has many URLs delimited by space. Now i want them to move to separate files each one holding 10 URLs per file.
http://3276.e-printphoto.co.uk/guardian http://abdera.apache.org/ http://abdera.apache.org/docs/api/index.html
I have used the below code to arrange... (6 Replies)
I have a text file with entries like
1186
5556
90844
7873
7722
12
7890.6
78.52
6679
3455
9867
1127
5642
..N so many records like this.
I want to split this file into multiple files like cluster1.txt, cluster2.txt, cluster3.txt, ..... clusterN.txt. (4 Replies)
Hi,
I have received a file which is 20 GB. We would like to split the file into 4 equal parts and process it to avoid memory issues.
If the record delimiter is unix new line, I could use split command either with option l or b.
The problem is that the line terminator is |##|
How to use... (5 Replies)
I have a large semicolon delimited file with thousands of columns and many thousands of line. It looks like:
ID1;ID2;ID3;ID4;A_1;B_1;C_1;A_2;B_2;C_2;A_3;B_3;C_3
AA;ax;ay;az;01;02;03;04;05;06;07;08;09
BB;bx;by;bz;03;05;33;44;15;26;27;08;09
I want to split this table in to multiple files:
... (1 Reply)
Discussion started by: trymega
1 Replies
LEARN ABOUT OPENDARWIN
cut
CUT(1) BSD General Commands Manual CUT(1)NAME
cut -- select portions of each line of a file
SYNOPSIS
cut -b list [-n] [file ...]
cut -c list [file ...]
cut -f list [-d delim] [-s] [file ...]
DESCRIPTION
The cut utility selects portions of each line (as specified by list) from each file and writes them to the standard output. If no file argu-
ments are specified, or a file argument is a single dash ('-'), cut reads from from the standard input. The items specified by list can be
in terms of column position or in terms of fields delimited by a special character. Column numbering starts from 1.
The list option argument is a comma or whitespace separated set of increasing numbers and/or number ranges. Number ranges consist of a num-
ber, a dash ('-'), and a second number and select the fields or columns from the first number to the second, inclusive. Numbers or number
ranges may be preceded by a dash, which selects all fields or columns from 1 to the first number. Numbers or number ranges may be followed
by a dash, which selects all fields or columns from the last number to the end of the line. Numbers and number ranges may be repeated, over-
lapping, and in any order. It is not an error to select fields or columns not present in the input line.
The options are as follows:
-b list
The list specifies byte positions.
-c list
The list specifies character positions.
-d delim
Use the first character of delim as the field delimiter character instead of the tab character.
-f list
The list specifies fields, delimited in the input by a single tab character. Output fields are separated by a single tab character.
-n Do not split multi-byte characters.
-s Suppress lines with no field delimiter characters. Unless specified, lines with no delimiters are passed through unmodified.
ENVIRONMENT
The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of cut if the -n option is specified. Their effect is described in
environ(7).
EXAMPLES
Extract users' login names and shells from the system passwd(5) file as ``name:shell'' pairs:
cut -d : -f 1,7 /etc/passwd
Show the names and login times of the currently logged in users:
who | cut -c 1-16,26-38
DIAGNOSTICS
The cut utility exits 0 on success, and >0 if an error occurs.
SEE ALSO paste(1)STANDARDS
The cut utility conforms to IEEE Std 1003.2-1992 (``POSIX.2'').
HISTORY
A cut command appeared in AT&T System III UNIX.
BUGS
The -c option is a synonym for the -b option, which causes incorrect behaviour in locales that support multibyte characters.
When operating on fields (-f option is specified), cut does not recognise multibyte characters, and the delim character is recognised in the
middle of multibyte sequences.
BSD June 6, 1993 BSD