It seems like this command iterates each time on a different row so $1 is the first field of each row.. But what caused it to refer to each row ?.
What I mean is, how it knows that for the second iteration for example, $1 should be the first field of the second row rather then the first field of the first row again ?
Because:
that is the way awk is described to work,
there are no loops in your code to cause an input line in your file to be evaluated more than once,
if awk was designed to only process the 1st line in a file (instead of processing each line in a file), it wouldn't be able to process multi-million line input files,
et cetera.
What in the description of awk on your system made you think that awk should only process the first line in a file?
Hi All,
I probably miss something fundamental here.
I want to rename a bunch of files in subdirectories (that might contain white spaces) with names that are related.
I thought following could do the job:
find . -name *.sh -exec mv {} $(echo {} | sed -e 's/0/1/g') \;
Now to be able to... (5 Replies)
I was wondering if it was possible to tell awk to print the output of a command in the print.
.... | awk '{print $0}'
I would like it to print the date right before $0, so something like (this doesn't work though)
.... | awk '{print date $0}' (4 Replies)
I am in the process of writing a script to change the grub password in the grub.conf file. I thought I had it figured out, but am running into an a problem I can't put my finger on.
Command I am running when I find that the grub.conf file contains "password --md5".
sed... (1 Reply)
Hi all,
after hours of playing around with this and scouring the web I decided to ask my fellow UNIX operators as I can't wrap my head around this.
First off,
I want to parse an input file with tabs (I could pull this off easily with different delimiters) but I was trying to make nicer... (2 Replies)
I hv a file --am executing a script which is giving me unexpected results
COntents of file:
f1
CMT_AP1_CONT:/opt/sybase/syboc125:150:ASE12_5::Y:UX:
CMT_AP1:/opt/sybase/syboc125:150:ASE12_5::Y:UX
f1.tmp
CMT_AP1_CONT:/opt/sybase/syboc125:150:ASE12_5::Y:UX:... (2 Replies)
Hello,
And when you think you know the basics of something, UNIX in this case, something like what I will describe below comes along....
On a Linux system, a "typical" directory with some files. Say 20.
I do:
> ls | sort > mylisting
Now when I:
> vi mylisting
There is mylisting... (13 Replies)
can anyone help identify where the issue is here?
awk 'BEGIN { c="perl -e 'print scalar(localtime("'${EPOCHTIME}'")), "\n"'"; c|getline; close( c ); print $2" "$3" "$4" "$6; }'
bash: syntax error near unexpected token `('
can't seem to figure it out. i tried this:
awk 'BEGIN {... (5 Replies)
Dear forum members,
I want the script to count ALA as one (an example in quotes) and return an integer as 1 and not return 5 as an integer as it does now (look bash script). So how can I upgrade my script that it first checks or after finding all instances of ALA checks whether it is the same... (25 Replies)
Discussion started by: Aurimas
25 Replies
LEARN ABOUT V7
join
JOIN(1) General Commands Manual JOIN(1)NAME
join - relational database operator
SYNOPSIS
join [ options ] file1 file2
DESCRIPTION
Join forms, on the standard output, a join of the two relations specified by the lines of file1 and file2. If file1 is `-', the standard
input is used.
File1 and file2 must be sorted in increasing ASCII collating sequence on the fields on which they are to be joined, normally the first in
each line.
There is one line in the output for each pair of lines in file1 and file2 that have identical join fields. The output line normally con-
sists of the common field, then the rest of the line from file1, then the rest of the line from file2.
Fields are normally separated by blank, tab or newline. In this case, multiple separators count as one, and leading separators are dis-
carded.
These options are recognized:
-an In addition to the normal output, produce a line for each unpairable line in file n, where n is 1 or 2.
-e s Replace empty output fields by string s.
-jn m Join on the mth field of file n. If n is missing, use the mth field in each file.
-o list
Each output line comprises the fields specifed in list, each element of which has the form n.m, where n is a file number and m is a
field number.
-tc Use character c as a separator (tab character). Every appearance of c in a line is significant.
SEE ALSO sort(1), comm(1), awk(1)BUGS
With default field separation, the collating sequence is that of sort -b; with -t, the sequence is that of a plain sort.
The conventions of join, sort, comm, uniq, look and awk(1) are wildly incongruous.
JOIN(1)