prints from the 3rd character to the end of the 1st input line in file1 and prints from the 3rd character to the end of the remaining lines from file1 into file2, while the command:
Code:
awk '{print substr($0,3)}' file1 > file2
prints from the 3rd character to the end of every input line from file1 into file2. In what way do you think the output produced by these two commands would be different?
I am facing some strange problem.
I know, there is only one record in a file 'test.txt' which starts with 'X'
I ensure that with following command,
awk /^X/ test.txt | wc -l
This gives me output = '1'.
Now I take out this record out of the file, as follows :
awk /^X/ test.txt >... (1 Reply)
I have a script with a find command using xargs to copy the files found to another directory. The find command is finding the appropriate file, but it's not copying. I've checked permissions, and those are all O.K., so I'm not sure what I'm missing. Any help is greatly appreciated.
This is... (2 Replies)
I've been trying to figure this out since last night, and I'm just stumped. The last time I did any shell scripting was 8 years ago on a Unix box, and it was never my strong suit. I'm on a Mac running Leopard now. Here's my dilemma - hopefully someone can point me in the right direction.
I'm... (10 Replies)
Hi!
Been working on a script and I've been having a problem. I've finally narrowed it down to this variable I'm setting:
servername=$(awk -v FS=\/ '{ print $7 } blah.txt | sed 's\/./-/g' | awk -v FS=\- '{print $1}')"
This will essentially pare down a line like this:
... (7 Replies)
I was trying to write a simple script which will read a text file and count the number of vowels in the file. My code is given below -
#!/bin/bash
file=$1
v=0
if
then
echo "$0 filename"
exit 1
fi
if
then
echo "$file not a file"
exit 2
fi
while read -n... (14 Replies)
Dear all,
I had script which used to work, but recently it is not working as expected.
I have command line in my shell script to choose the following format from the output_elog and perform some task afterwards on
As you see, I want all numbers in foramt following RED mark except for... (12 Replies)
Hi, I'm having trouble with a simple copy command in a script on HPUX.
I am trying to copy a file and append date & time.
The echo command prints out what I am expecting..
echo "Backing up $file to $file.$DATE.$FIXNUM" | tee -a $LOGFILE
+ echo 'Backing up... (4 Replies)
Hi Experts,
Need your kind help with gsub awk.
Below is my pattern:"exec=1_host_cnt=100_dup=4_NameTag=targetSrv_500.csv","'20171122112948"," 100"," 1"," 1"," 4","400","","",
" aac sample exec ""hostname=XXXXX commandline='timeout 10 openssl speed -multi 2 ; exit 0'"" ","-1","-1","1","... (6 Replies)
This is my ubuntu version:
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.4 LTS
Release: 16.04
Codename: xenial
$ /bin/awk -V | head -n1
bash: /bin/awk: No such file or directory
I have gotten a script that helps me to parse,... (14 Replies)
Discussion started by: delbroooks
14 Replies
LEARN ABOUT DEBIAN
plan9-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 one of the file names 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.
Input fields are normally separated spaces or tabs; output fields by space. In this case, multiple separators count as one, and leading
separators are discarded.
The following options are recognized, with POSIX syntax.
-a n In addition to the normal output, produce a line for each unpairable line in file n, where n is 1 or 2.
-v n Like -a, omitting output for paired lines.
-e s Replace empty output fields by string s.
-1 m
-2 m Join on the mth field of file1 or file2.
-jn m Archaic equivalent for -n m.
-ofields
Each output line comprises the designated fields. The comma-separated field designators are either 0, meaning the join field, or
have the form n.m, where n is a file number and m is a field number. Archaic usage allows separate arguments for field designators.
-tc Use character c as the only separator (tab character) on input and output. Every appearance of c in a line is significant.
EXAMPLES
sort /etc/passwd | join -t: -1 1 -a 1 -e "" - bdays
Add birthdays to the /etc/passwd file, leaving unknown birthdays empty. The layout of /adm/users is given in passwd(5); bdays con-
tains sorted lines like
tr : ' ' </etc/passwd | sort -k 3 3 >temp
join -1 3 -2 3 -o 1.1,2.1 temp temp | awk '$1 < $2'
Print all pairs of users with identical userids.
SOURCE
/src/cmd/join.c
SEE ALSO sort(1), comm(1), awk(1)BUGS
With default field separation, the collating sequence is that of sort -b -ky,y; with -t, the sequence is that of sort -tx -ky,y.
One of the files must be randomly accessible.
JOIN(1)