10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
I got a below requirement from this forum, but the solution provided was not clear.
Below is the requirement
Input file
A 1 Z
A 1 ZZ
B 2 Y
B 2 AA
Required output
B Y|AA
A Z|ZZ (5 Replies)
Discussion started by: stew
5 Replies
2. UNIX for Dummies Questions & Answers
instead of writing print command in awk, i saw in some posts that we can simply write a number before we end the awk command and it will print the file.
As given below:
$awk '{some manipulation; print}' filename
$awk '{some manipulation}1' filename
I also tried replacing the... (2 Replies)
Discussion started by: PranavEcstasy
2 Replies
3. Shell Programming and Scripting
I have a file sample.txt with the following contents:
the following gives output as
awk 'NF{s=$0; print s}' sample.txt
but,
awk 'NF{s=$0}{print s}' sample.txtgives output as
why this difference, can someone explain me? (6 Replies)
Discussion started by: royalibrahim
6 Replies
4. Shell Programming and Scripting
I have executed the below command:
find . -name "Ks*" -type f -exec ls -ltr {} \; | awk '{printf("%ld %s %d %s \n",$5,$6,$7,$8,$9)}'
and here is the output:
1282 Oct 7 2004
51590 Jul 10 2006
921 Oct 7 2004
1389 Jun 4 2003
1037 May 19 2004
334 Mar 24 2004
672 Jul 8 2003
977... (6 Replies)
Discussion started by: venkatesht
6 Replies
5. Shell Programming and Scripting
Hi All,
I have two files as given below:
fileA
1234|aaaaa|vvvv
2222|bbbbbb|cbxxbjh
3333|cccc|jhjhj
fileB
3434|bbbcc|cbxxbjh
1234|cat|bullet
3333|cccc|jhjhj
I need a script that reads the first column from fileA (i.e 1234) and searches in fileB in the first parameter(i.e first... (7 Replies)
Discussion started by: jisha
7 Replies
6. Shell Programming and Scripting
Hi ,
I have a file in the below format:
1.txt
awk 'BEGIN { printf ("%1s", "man" )} '
awk 'BEGIN { printf ("%9s", "women" )} '
awk 'BEGIN { printf ("%56s", "human")} '
##
###
##
echo "$!"
##
awk 'BEGIN { printf ("%1s", "aaa" )} '
awk 'BEGIN { printf ("%19s", "bbb" )} ' ... (4 Replies)
Discussion started by: jisha
4 Replies
7. Shell Programming and Scripting
hi
how to get the values in two columns (may be 2nd and 5th column) of a file line by line.
either i want to get the two fields into different variables and use a for loop to get these values line by line. (3 Replies)
Discussion started by: Pradee
3 Replies
8. Shell Programming and Scripting
Hello,
Iam trying to get the IP of the hostname of the machine from /etc/hosts.
I used the command as below:
But the result shows the IP with the hostname..
like
192.168.0.8 test12111.com
I need to get only 192.168.0.8
Please help
Thanks in advance
esham (11 Replies)
Discussion started by: esham
11 Replies
9. Shell Programming and Scripting
Hi all,
column1
--------
33
44
55
66
please provide the script using awk command to dispaly output 55.
Help apperciated..
thanks,
Nirmal (4 Replies)
Discussion started by: abnirmal
4 Replies
10. UNIX for Dummies Questions & Answers
I'm having a file with 5 fields.
I want to sort that file according to one field
no 3. How shall I do using awk programming.
Any input appreciatable.
regards,
vadivel. (7 Replies)
Discussion started by: vadivel
7 Replies
UNBUFFER(1) General Commands Manual UNBUFFER(1)
NAME
unbuffer - unbuffer output
SYNOPSIS
unbuffer program [ args ]
INTRODUCTION
unbuffer disables the output buffering that occurs when program output is redirected from non-interactive programs. For example, suppose
you are watching the output from a fifo by running it through od and then more.
od -c /tmp/fifo | more
You will not see anything until a full page of output has been produced.
You can disable this automatic buffering as follows:
unbuffer od -c /tmp/fifo | more
Normally, unbuffer does not read from stdin. This simplifies use of unbuffer in some situations. To use unbuffer in a pipeline, use the
-p flag. Example:
process1 | unbuffer -p process2 | process3
CAVEATS
unbuffer -p may appear to work incorrectly if a process feeding input to unbuffer exits. Consider:
process1 | unbuffer -p process2 | process3
If process1 exits, process2 may not yet have finished. It is impossible for unbuffer to know long to wait for process2 and process2 may
not ever finish, for example, if it is a filter. For expediency, unbuffer simply exits when it encounters an EOF from either its input or
process2.
In order to have a version of unbuffer that worked in all situations, an oracle would be necessary. If you want an application-specific
solution, workarounds or hand-coded Expect may be more suitable. For example, the following example shows how to allow grep to finish pro-
cessing when the cat before it finishes first. Using cat to feed grep would never require unbuffer in real life. It is merely a place-
holder for some imaginary process that may or may not finish. Similarly, the final cat at the end of the pipeline is also a placeholder
for another process.
$ cat /tmp/abcdef.log | grep abc | cat
abcdef
xxxabc defxxx
$ cat /tmp/abcdef.log | unbuffer grep abc | cat
$ (cat /tmp/abcdef.log ; sleep 1) | unbuffer grep abc | cat
abcdef
xxxabc defxxx
$
BUGS
The man page is longer than the program.
SEE ALSO
"Exploring Expect: A Tcl-Based Toolkit for Automating Interactive Programs" by Don Libes, O'Reilly and Associates, January 1995.
AUTHOR
Don Libes, National Institute of Standards and Technology
1 June 1994 UNBUFFER(1)