line_no=6
echo 'Phone,' `awk 'NR==$line_no{print;exit}' <filename>`
what is the error in this..
it says..
awk: Field $() is not correct.
The input line number is 1. The file is <filename>.
The source line number is 1.
i want to print the data in the $line_no line of a certain... (2 Replies)
I'm a bit stuck in getting variable from awk to shell. I tried searching but most of them showing to assign to shell variable via..
VAR=`echo $line | awk -F: '{print $1}'`
which is correct ofcourse
My problem is multiple assignments of variable like this one. The above solution will give... (10 Replies)
Dear All,
we have a command output which looks like :
Total 200 queues in 30000 Kbytes
and we're going to get "200" and "30000" for further process. currently, i'm using :
numA=echo $OUTPUT | awk '{print $2}'
numB=echo $OUTPUT | awk '{print $5}'
my question is : can I use just one... (4 Replies)
In awk script,
#!/bin/sh
awk 'BEGIN{i=0;}{i=i+5;}END{print i}' in.txt
vr=0;
vr=$i;
echo "$vr"
How can i assign that value of i in $vr(variable) of shell script? (7 Replies)
I have 3 files and each contain m*n matrix.
m = number of rows (horizontal lines)
n = number of columns (entries in a particular line)
What I wish to find is the sum of the 2nd number in the last row.
Ex
file1.dat
2 5 8 8
4 6 7 8
3 8 3 7
file2.dat
3 4 1 4
8 4 0 3
4 7 3 7
... (3 Replies)
Trying to do something like this
ls -lrt | awk '$9=="test5"'
-rw-r--r-- 1 lrmq db2iadm1 381 Sep 20 21:56 test5
But now, I need to give a variable in place of test5. For example let's define x as test5
x=test5
ls -lrt | awk '$9=="$x"'
This doesn't seem to be working. It doesn't take the... (4 Replies)
How do you use a shell variable in awk? I am using Solaris 10 and don't have GNU products installed.
File (transportation.txt) contents:
car
boat
airplane
snowmobile
bicycle
sled
This awk statment works (prints from the car line down to bicycle
awk '/car/,/bicycle/'... (8 Replies)
I am reasonably capable with awk and its quirks, but not with shell weirdness. This has to be Bourne Shell for portability reasons. I have an awk program that is working just fine; it handles multiple input streams and produces several reports, based on the request (-v Variables). In addition... (3 Replies)
I want to split one file input.tab into two separate ones, odd lines to input_reads1.txt, even lines to input_reads2.txt for a serial of files with similar name pattern. Also I want to "match" input/output file names to keep consistency of file name:
CSEL_02.0_input.tab
CSEL_03.4_input.tab... (2 Replies)
I have the following script, and I want to assign the output ($10 and $5) from awk to N and L:
grdinfo data.grd | awk '{print $10,$5}'| read N L
output from gridinfo data.grd is: data.grd 50 100 41 82 -2796 6944 0.016 0.016 3001 2461. where N and L is suppose to be 3001 and 100. I use... (8 Replies)
Discussion started by: geomarine
8 Replies
LEARN ABOUT MOJAVE
cat
CAT(1) BSD General Commands Manual CAT(1)NAME
cat -- concatenate and print files
SYNOPSIS
cat [-benstuv] [file ...]
DESCRIPTION
The cat utility reads files sequentially, writing them to the standard output. The file operands are processed in command-line order. If
file is a single dash ('-') or absent, cat reads from the standard input. If file is a UNIX domain socket, cat connects to it and then reads
it until EOF. This complements the UNIX domain binding capability available in inetd(8).
The options are as follows:
-b Number the non-blank output lines, starting at 1.
-e Display non-printing characters (see the -v option), and display a dollar sign ('$') at the end of each line.
-n Number the output lines, starting at 1.
-s Squeeze multiple adjacent empty lines, causing the output to be single spaced.
-t Display non-printing characters (see the -v option), and display tab characters as '^I'.
-u Disable output buffering.
-v Display non-printing characters so they are visible. Control characters print as '^X' for control-X; the delete character (octal
0177) prints as '^?'. Non-ASCII characters (with the high bit set) are printed as 'M-' (for meta) followed by the character for the
low 7 bits.
EXIT STATUS
The cat utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
The command:
cat file1
will print the contents of file1 to the standard output.
The command:
cat file1 file2 > file3
will sequentially print the contents of file1 and file2 to the file file3, truncating file3 if it already exists. See the manual page for
your shell (i.e., sh(1)) for more information on redirection.
The command:
cat file1 - file2 - file3
will print the contents of file1, print data it receives from the standard input until it receives an EOF ('^D') character, print the con-
tents of file2, read and output contents of the standard input again, then finally output the contents of file3. Note that if the standard
input referred to a file, the second dash on the command-line would have no effect, since the entire contents of the file would have already
been read and printed by cat when it encountered the first '-' operand.
SEE ALSO head(1), more(1), pr(1), sh(1), tail(1), vis(1), zcat(1), setbuf(3)
Rob Pike, "UNIX Style, or cat -v Considered Harmful", USENIX Summer Conference Proceedings, 1983.
STANDARDS
The cat utility is compliant with the IEEE Std 1003.2-1992 (``POSIX.2'') specification.
The flags [-benstv] are extensions to the specification.
HISTORY
A cat utility appeared in Version 1 AT&T UNIX. Dennis Ritchie designed and wrote the first man page. It appears to have been cat(1).
BUGS
Because of the shell language mechanism used to perform output redirection, the command ``cat file1 file2 > file1'' will cause the original
data in file1 to be destroyed!
The cat utility does not recognize multibyte characters when the -t or -v option is in effect.
BSD March 21, 2004 BSD