07-16-2013
Cut text file in place
I have a file that i want to take only the first part of it and discard the rest, to be accurate,I need the first 137097 lines but I cant use split because I dont have enough space on my disck. I need sth to cut the file in its place
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Say I do a date command and get the time from 15 minutes ago.
I have a text file with the date printed out every minute or so and I want to cut the file at the date stamp given to me by the 15 minute ago time stamp.
Is there an easy way to do this?
Example:
date +%M gives me 56
I... (2 Replies)
Discussion started by: LordJezo
2 Replies
2. Shell Programming and Scripting
Hi,
I have a simple question:
I need to enter some text in a text file at a certain place via perl.
I would first need to find that specific text in the file and then I would like to insert a line after that particular line.
Say I have this text file:
I am a great Perl Programmer
I... (1 Reply)
Discussion started by: som.nitk
1 Replies
3. Shell Programming and Scripting
I have a big text file. I want to cut it into 2 pieces at known point or I know the pattern of the contents from where it can separate the files. Is there any quick command/solution? (4 Replies)
Discussion started by: sandy221
4 Replies
4. UNIX for Dummies Questions & Answers
How can I cut the text of definite length say from line no. 20 to 1000?
It is trivial ques, but I am very new to Unix.
Thanks :) (3 Replies)
Discussion started by: JackR
3 Replies
5. Shell Programming and Scripting
Hi,
I lack the utter fundamentals on how to craft an awk script.
I have hundreds of text files that were mangled by .doc format so all the lines are broken up so I need to join all of the lines of text into a single line. Normally I use vim command "ggVGJ" to join all lines but with so many... (3 Replies)
Discussion started by: n00ti
3 Replies
6. Shell Programming and Scripting
Hi
I would love a bit of help with a problem im having with a script. I need to insert a line of text which is saved in a variable called $fwInsert into a file whos name is saved in a variable called $server but it needs to be in a certain order.
The file is a forward file for a network and... (12 Replies)
Discussion started by: KatieV
12 Replies
7. Shell Programming and Scripting
Hello Friends,
I am stuck with the below problem.Any help will be appreciated.
I have a file which has say 100 lines.
On the second last line I have a line from which i want to remove certain characters..
e.g
CAST(CAST( A as varchar(50)) || ',' ||
CAST(CAST( B as varchar(50)) || ',' ||... (8 Replies)
Discussion started by: vital_parsley
8 Replies
8. UNIX for Advanced & Expert Users
I am being passed a file in UNIX, ie: variable.txt
I need to extract the first part of the file content, up to the period, content ie: common_dir.second_output
cut -d'.' -f1 /content/stores/variable.txt
I then need to utilize the results to create a variable ($1), and test on that... (4 Replies)
Discussion started by: talonbow
4 Replies
9. Shell Programming and Scripting
I am trying to use awk to place the contens of a filename in $1 and $2 followed by the data in the text file. Basically, put the filename within the text file. There are over 1000 files in the directory and as of now each file is saved with a unique name but it is not within the file. Thank you... (10 Replies)
Discussion started by: cmccabe
10 Replies
10. Shell Programming and Scripting
Hello,
I have some text data that is in the form of multi-line records. Each record ends with the string $$$$ and the next record starts on the next line.
RDKit 2D
15 14 0 0 0 0 0 0 0 0999 V2000
5.4596 2.1267 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 ... (5 Replies)
Discussion started by: LMHmedchem
5 Replies
CUT(1) BSD General Commands Manual CUT(1)
NAME
cut -- cut out selected portions of each line of a file
SYNOPSIS
cut -b list [-n] [file ...]
cut -c list [file ...]
cut -f list [-w | -d delim] [-s] [file ...]
DESCRIPTION
The cut utility cuts out selected portions of each line (as specified by list) from each file and writes them to the standard output. If no
file arguments are specified, or a file argument is a single dash ('-'), cut reads 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 and field numbering start 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 columns or fields from the first number to the second, inclusive. Numbers or number
ranges may be preceded by a dash, which selects all columns or fields from 1 to the last number. Numbers or number ranges may be followed by
a dash, which selects all columns or fields from the last number to the end of the line. Numbers and number ranges may be repeated, overlap-
ping, and in any order. It is not an error to select columns or fields 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 delim as the field delimiter character instead of the tab character.
-f list
The list specifies fields, separated in the input by the field delimiter character (see the -d option). Output fields are separated
by a single occurrence of the field delimiter character.
-n Do not split multi-byte characters. Characters will only be output if at least one byte is selected, and, after a prefix of zero or
more unselected bytes, the rest of the bytes that form the character are selected.
-s Suppress lines with no field delimiter characters. Unless specified, lines with no delimiters are passed through unmodified.
-w Use whitespace (spaces and tabs) as the delimiter. Consecutive spaces and tabs count as one single field separator.
ENVIRONMENT
The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of cut as described in environ(7).
EXIT STATUS
The cut utility exits 0 on success, and >0 if an error occurs.
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
SEE ALSO
colrm(1), 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.
BSD
August 8, 2012 BSD