The first row of my file contains headers so I want them. Otherwise, I want only lines containing the BASH variable pattern which I am passing to awk with -v.
This is giving me all the lines containing the pattern but not the first line.
It would be convenient to be able to combine awk tests. For example, suppose that I do this query:
awk '$1 != "Bob" || $1 != "Linda" {print $2}' datafileIs there a reasonable way to combine the conditions into a single statement? For example, in egrep, I can do:
egrep -v "Bob|Linda"... (4 Replies)
Hi there,
what is wrong with this?
grep ">>" alarms_temp | awk '{print substr($5, 2), $7}' | read var1 var2
echo "$var1"
echo "$var2"
Both variable are empty, but if i run:
grep ">>" alarms_temp | awk '{print substr($5, 2), $7}'
I have:
0 9
as a result. (2 Replies)
Hi,
I am running a shell script from a central server to multiple remote servers using the following code:
application_check()
{
# Linux/UNIX box with ssh key based login
SERVERS=`cat /tmp/server-details`
# SSH User name
USR="user"
# create new file
> /tmp/abc.log
# connect... (2 Replies)
echo "abc:bcd" |awk '{split($0,b,":");print "b" is good }'
I want to "bcd" is good , anything is wrong with my, please don't change my thought with split, I just want to know what's wrong :o (1 Reply)
I have a file
and if I'm doing following action on that file it's coming up correctly
awk -F"," '/DATA_TYPE/ { cnt += $3 } END { print " DATA_TYPE count=" cnt}' inter
DATA_TYPE count=19593131
now if I'm changing same AWK, so that now it can accept variable, then it's somehow not working.... (3 Replies)
file1:
maximum_delay time: 102.794 ms
maximum_delay time: 92.977 ms
maximum_delay time: 98.895 ms
maximum_delay time: 96.891 ms
maximum_delay time: 86.966 ms
maximum_delay time: 95.91 ms
maximum_delay time: 98.921 ms
maximum_delay time: 89.881 ms
maximum_delay time: 92.931 ms... (1 Reply)
Hi there, I am trying to select a number of lines based on the lat. lon columns in a file but my awk code gives me empty result.
Here is my file:
20100213 102212 33.1185 39.4078 2.9
20100214 141753 33.1058 39.9068 2.9
20100218 115828 33.1907 39.3575 2.9
20100225 220001 33.1932 39.9448... (10 Replies)
I have a script that logs into a server and pings several other servers in order to verify IP path between servers.
The output can look like this, if good pings:
Response from 1.1.1.4;_id=0, vlan_prio=0): seq=0 time=91.547 ms.
Response from 1.1.1.4;_id=0, vlan_prio=0): seq=1 time=61.176 ms.... (7 Replies)
Discussion started by: he204035
7 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)