hi all
by using cat /etc/passwd
I've got these output.
ajh1ect:x:839:501:Anthony:/home/ajh1ect:/bin/bash
mjb1ect:x:840:501:Michael:/home/mjb1ect:/bin/bash
mv3ect:x:841:501:Marian:/home/mv3ect:/bin/bash
now I want to see just the user ID and group ID.
so what is the code will be with... (2 Replies)
Hello. I am an older newbie trying to learn Unix. I have a task to perform and it entails counting lines of code. Currently, I am pointing to the directory where the files are contained and performing a 'find' on the file extensions (cpp, c, html, java, etc.) and piping that info with a 'wc -l'.... (2 Replies)
I have two .txt files one called good.txt and the other one is called bad.txt. Both contain email addresses in the following format:
john@john.com
bob@bob.com
sarah@sarah.com
Basically, I want to scrub good.txt against bad.txt and save the resulting output in scrubbed.txt meaning that if... (2 Replies)
------------------------------------------------------------------
Ex of Warning messgae,(Many similar lines occure for Both Test and Test1)
-WARNING:Below Field not implemented in file File name: /home/test/
new/file1, msg buffer is:
:Test:000948
... (1 Reply)
Hello all,
Can anyone help with the following? :)
I have file1 with 150,000 words in a list and file2 with 148,000 words in a list - all of which are in file1. I want to create a new file with the words that DO NOT match (i.e of 2000 words). I have done this very simple command , which is... (1 Reply)
Hi All,
I have a huge file, I need to two things from this file. I need to know the IP address or the hostname and second thing is the date&time.
The file looks like this and I need to get my data from this...
Trying...
Connected to 204.109.172.117.
Escape character is '^]'.
Fri... (4 Replies)
thanks for your reply.
but i'm not quite sure what your code is doing.
i may be using it wrong but i'm not getting what i'm supposed to get.
could you please elaborate?
thanks again, (6 Replies)
Thread1 {
x = 2
y = 10485
}
Thread2 {
x = 16
y = 1048
}
Thread3 {
x = 1
y = 1049
}
Thread4 {
x = 4
y = 1047
z = 500
}
Suppose the above is a piece of code. I need to automate and verify that the value of x under Thread1's 2.
There are several... (3 Replies)
got a file as y.txt
1 abc,def,ghj
2 defj,abc.kdm,ijk
3 lmn,cbk,mno
4 tmp,tmop,abc,pkl
5 pri,chk,cbk,lmo
6 def,cbk.pro,abc.kdm
i want to search in the above file the key word like abc
looking for two outcomes by passing the parameter value as abc into function and the two outocmes are... (6 Replies)
Discussion started by: silgun
6 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)