01-26-2011
If there's not enough memory or address space for grep to store the whole file at once, how will awk? It might try for a while but I think it'll break down halfway through...
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1. Shell Programming and Scripting
Hi, i've two files (file1, file2) i want to take value (in column1) and search in file2 if the they match print the value from file2.
this is what i have so far.
awk 'FILENAME=="file1"{ arr=$1 }
FILENAME=="file2"
{print $0}
' file1 file2 (2 Replies)
Discussion started by: myguess21
2 Replies
2. Shell Programming and Scripting
Wat does this command do?
fileA is a subset of fileB..now, i need to find the lines in fileB that are not in fileA...i.e fileA - fileB.
diff fileA fileB gives the ouput but the format looks no good....
I just need the contents alone not the line num etc. (7 Replies)
Discussion started by: vijay_0209
7 Replies
3. UNIX for Dummies Questions & Answers
file1 has pgap500 500
file2 has bunch of data
cat file1 file2 > file3
cp file2 file3.dat then vi pgap500 500 onto 1st line
compare file3 and fil3.dat, they are not the same.
any idea ? the 1st line, i want to put pg500 xxx
---------- Post updated at 07:35 AM ---------- Previous... (2 Replies)
Discussion started by: tjmannonline
2 Replies
4. Shell Programming and Scripting
Hello, I am new to shell scripting and i need to create a script with the following directions and I can not figure it out.
Create a shell script called newest.bash that takes two filenames as input arguments ($1 and $2) and prints out the name of the newest file (i.e. the file with the... (1 Reply)
Discussion started by: mandylynn78
1 Replies
5. UNIX for Dummies Questions & Answers
I have very limited coding skills but I'm wondering if someone could help me with this. There are many threads about matching strings in two files, but I have no idea how to add a column from one file to another based on a matching string.
I'm looking to match column1 in file1 to the number... (3 Replies)
Discussion started by: pathunkathunk
3 Replies
6. Shell Programming and Scripting
Hi guys!
I'm trying to write something to find each line of file1 into file2, if line is found return YES, if not found return NO. The result can be written to a new file.
Can you please help me out?
FILE1 INPUT:
WATER
CAR
SNAKE
(in reality this file has about 600 lines each with a... (2 Replies)
Discussion started by: demmel
2 Replies
7. Shell Programming and Scripting
HI,
I would like a little help on writing a if statement.
What i have so far is:
#!/bin/bash
FILE1=path/to/file1
FILE2=path/to/file2
echo ${FILE1} ${FILE2}
if ]
then
echo file1 and file2 not found
else
echo FILE ok
fi (6 Replies)
Discussion started by: techy1
6 Replies
8. UNIX for Dummies Questions & Answers
I want to print only the lines in file2 that match file1, in the same order as they appear in file 1
file1
file2
desired output:
I'm getting the lines to match
awk 'FNR==NR {a++}; FNR!=NR && a' file1 file2
but they are in sorted order, which is not what I want:
Can anyone... (4 Replies)
Discussion started by: pathunkathunk
4 Replies
9. Shell Programming and Scripting
I need to know if file1 is a subset of file2 i.e all the contents of file1 are present in file2 or not.
Here is how i would do it.
Read line by line file1 and grep every line in file2 in a for loop. any failing grep would means that it is not a subset.
Is there a quicker or easier way... (3 Replies)
Discussion started by: mohtashims
3 Replies
10. Shell Programming and Scripting
I am trying to use awk to find all the $2 values in file2 which is ~30MB and tab-delimited, that are between $2 and $3 in file1 which is ~2GB and tab-delimited.
I have just found out that I need to use $1 and $2 and $3 from file1 and $1 and $2of file2 must match $1 of file1 and be in the range... (6 Replies)
Discussion started by: cmccabe
6 Replies
LEARN ABOUT XFREE86
zgrep
ZGREP(1) General Commands Manual ZGREP(1)
NAME
zgrep - search possibly compressed files for a regular expression
SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename...
DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code:
(-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the
standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep.
If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.
EXIT CODE
2 - An option that is not supported was specified.
AUTHOR
Charles Levert (charles@comm.polymtl.ca)
SEE ALSO
grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)
ZGREP(1)