Note that if an input file contains any empty lines (i.e., just a <newline> character), they will not appear in the output produced by the above command.
However, the command:
Code:
grep '^' *.txt > output
should do what was requested. (Note that if the input files are matched by the pattern *.txt, the output file must not also match that pattern unless it is located in a different directory so the input file pattern won't match the output file's pathname.
This User Gave Thanks to Don Cragun For This Post:
Hi,
Fairly new to unix scripting, hoping to get some help.
using AIX v5
Basically I have 3 files 1). Header record 2). many detail record 3). Trailer record
My desired result is 1 file which contains Heaeder, Detail, Trailer
Currenty I am using a series of:
... (8 Replies)
Hi,
I have a file x which is being upated continuously.
I want to add file y in the file x but at the beginning of file x.
file x file y After commands file x
eeee aaaa aaaa
gggg bbbb bbbb
hhhh... (2 Replies)
Hello,
I have 50 text files in a directory called "AllFiles"
I want to make a program that will go inside of the "AllFiles" Directory and count the number of lines in each individual text file. Then, the program will calculate how many more lines there are over 400 in each text file and... (7 Replies)
Dear All-
Please suggest a single unix command which can append blank line in multiple files.
I need to achieve this using a single unix command and not a script
Please do advice
Regards,
Suresh (2 Replies)
Hi Folks,
I was given a task to append three IP's at the end of a specific (and unique) line within a file on multiple servers.
I was not able to do that with the help of a script. All I could was:
for i in server1 server2 server3 server4
do
ssh $i
done
I know 'sed' could be used to... (5 Replies)
I am writing a code to append some numbers in the beginning of each line in all the files present in a directory. The number of files are really huge. The files are numbered as 1.sco, 2.sco, 4.sco (Note: 3.sco is missing).
The files currently look like this:
1.sco
2 3
5 6
6 7My task is to... (4 Replies)
Hi..Can anyone suggest a simple way of achieving this. I have several files which ends with extension .vcf . I will give example with two files
In the below files, we are interested in
File 1:
38 107 C 3 T 6 C/T
38 241 C 4 T 5 C/T
38 247 T 4 C 5 T/C
38 259 T 3 C 6 T/C... (8 Replies)
I want to append file names at the beginning of a line for each row
file content
abc.txt.gz 123|654|987
bcd.txt.gz 876|trf|kjh
I want a single output file with below format
abc.txt.gz|123|654|987
bcd.txt.gz|876|trf|kjh
This one is working but only with unzip files,need to have... (3 Replies)
Hi,
I have been searching how to do this but I can't seem to find how to do it. Hopefully someone can help.
I have multiplr files, 100's example 12345-zxys.213423.zyz.txt. I want to be able to take all these files and remove the first '12345-' from each of the files. '12345-' these characters... (5 Replies)
Discussion started by: israr75
5 Replies
LEARN ABOUT PLAN9
grep
GREP(1) General Commands Manual GREP(1)NAME
grep - search a file for a pattern
SYNOPSIS
grep [ option ... ] pattern [ file ... ]
DESCRIPTION
Grep searches the input files (standard input default) for lines (with newlines excluded) that match the pattern, a regular expression as
defined in regexp(6). Normally, each line matching the pattern is `selected', and each selected line is copied to the standard output.
The options are
-c Print only a count of matching lines.
-h Do not print file name tags (headers) with output lines.
-i Ignore alphabetic case distinctions. The implementation folds into lower case all letters in the pattern and input before interpre-
tation. Matched lines are printed in their original form.
-l (ell) Print the names of files with selected lines; don't print the lines.
-L Print the names of files with no selected lines; the converse of -l.
-n Mark each printed line with its line number counted in its file.
-s Produce no output, but return status.
-v Reverse: print lines that do not match the pattern.
Output lines are tagged by file name when there is more than one input file. (To force this tagging, include /dev/null as a file name
argument.)
Care should be taken when using the shell metacharacters $*[^|()= and newline in pattern; it is safest to enclose the entire expression in
single quotes '...'.
SOURCE
/sys/src/cmd/grep.c
SEE ALSO ed(1), awk(1), sed(1), sam(1), regexp(6)DIAGNOSTICS
Exit status is null if any lines are selected, or non-null when no lines are selected or an error occurs.
GREP(1)