I am trying to use AWK to print only the first field of numerous text files, and then overwrite these files. They are of the format 1*2,3,4,5. I have tried the following code (using tcsh):
However, I get very inconsistent results each time I run this script. I have tried creating a tmp directory where I run the above command on a clean set of the files. But, sometimes it returns empty files, whereas other times it runs fine for all the files. Any ideas on what is going on here, or if there is a better way to get awk to do what I want?
On a side note, I have tried a similar method using cut:
I am new to unix and have pieced together two scripts that work independently.
The first checks all the filesystems and reports which are running low on space.
df -m | awk 'int($4) > 75 {
print $1 " has only " $3 "mb free from a total of " $2 ", this filesystem is
" $4 " full! \n"
}... (1 Reply)
Hey,
I know this is a stupid question, but it doesn't work.
I have a file with 10 lines and I want to pipe the content to awk and then print line 1 til 2 into another file and then line 3-4 ...
So my script looks like that, but doesn't work:
cat grid_ill.pts | awk '{
for (NR=1;NR<3;NR++)... (8 Replies)
I have two files which I would like to compare and then manipulate in a way.
File1:
pictures.txt 1.1 1.3
dance.txt 1.2 1.4
treehouse.txt 1.3 1.5
File2:
pictures.txt 1.5 ref2313 1.4 ref2345 1.3 ref5432 1.2 ref4244
dance.txt 1.6 ref2342 1.5 ref2352 1.4 ref0695 1.3 ref5738 1.2... (1 Reply)
Hello,
I was wondering if it is possible to do a loop on letters rather than numbers with awk (gawk).
Basically I used to do:
echo "nothing" | gawk '{for(i=1;i<11;i++)print i}'
But I would like to do something like that (which obviously does not work):
echo "nothing" | gawk '{for(i in... (6 Replies)
Hi, everyone!
I have a file, when I print its $1 out it show several strings like this:
AABBCC
AEFJKLFG
FALEF
FAIWEHF
What I want to do is that, after output of each record, search the string in all files in the same folder, print out the record and file name.
This is what I want... (4 Replies)
Hi All,
I am new to AWK programming. I have the following for loop in my awk program.
cat printhtml.awk:
BEGIN
-------- <some code here>
END{
----------<some code here>
for(N=0; N<H; N++)
{
for(M=5; M<D; M++) print "\t" D "";
}
-----
}
... (2 Replies)
Hello, I currently have managed to get an awk function working inside a for loop that allows me to combine two files based on their headings but what I have not been able to do is print the output to files with variable names.
awk '
NR==FNR {a=$0; next}
/^>/ {$0 = $0" "a;}
... (2 Replies)
Hi
My Requirement is to take the sum of each column
below is the input file.
1 2 3 4
1 2 3 4
1 2 3 4
Initial i was using below command to achieve my desired result. however this was adding the row and not column.
i am not able understand why this is happening
awk... (1 Reply)
Hi all,
I was searching the net for a solution for my problem... unfortunately nothing so far.
I want to sort on more than on column tab delimited file and keep the line if in the column I sort there is no value, but for those who have a value I want them only unique.
I have tried the... (5 Replies)
Discussion started by: ksenia
5 Replies
LEARN ABOUT ULTRIX
cat
cat(1) General Commands Manual cat(1)Name
cat - concatenate and print data
Syntax
cat [ -b ] [ -e ] [ -n ] [ -s ] [ -t ] [ -u ] [ -v ] file...
Description
The command reads each file in sequence and displays it on the standard output. Therefore, to display the file on the standard output you
type:
cat file
To concatenate two files and place the result on the third you type:
cat file1 file2 > file3
To concatenate two files and append them to a third you type:
cat file1 file2 >> file3
If no input file is given, or if a minus sign (-) is encountered as an argument, reads from the standard input file. Output is buffered in
1024-byte blocks unless the standard output is a terminal, in which case it is line buffered. The utility supports the processing of 8-bit
characters.
Options-b Ignores blank lines and precedes each output line with its line number.
-e Displays a dollar sign ($) at the end of each output line.
-n Precedes all output lines (including blank lines) with line numbers.
-s Squeezes adjacent blank lines from output and single spaces output.
-t Displays non-printing characters (including tabs) in output. In addition to those representations used with the -v option, all tab
characters are displayed as ^I.
-u Unbuffers output.
-v Displays non-printing characters (excluding tabs and newline) as the ^x. If the character is in the range octal 0177 to octal 0241,
it is displayed as M-x. The delete character (octal 0177) displays as ^?. For example, is displayed as ^X.
See Alsocp(1), ex(1), more(1), pr(1), tail(1)cat(1)