Hi
Having a file as follows
file1.txt
Date (dd/mm)Time Server IP Error Code
===========================================================================
10/04/2008 10:10 ServerA xxx.xxx.xxx.xxx 6
10/04/2008 10:10 ServerB ... (3 Replies)
I have to files
File1
1 23
2 34
3 7
4 56
5 61
6 22
7 65
File2
2 21
4 32
7 22
Now i need to compare column1 of both the files and generate a third file which should contain all the values of 1st column of 1st file and in the second column i need to get the coressponding row... (2 Replies)
Hi All, can you help me with this:
grep XXX dir/*.txt|wc -l > newfile.txt - this put the results in the newfile.txt, but I want to add another column in the newfile.txt, string 'YYYYY', separated somehow, which corresponds on the grep results?
For example grep will grep XXX dir/*.txt|wc -l >... (5 Replies)
I like to do the following, please help! Thanks a lot
for f in seq(f1 f2 f3 g1 h1 t2)
do
cut -d "+" -f2 $f > $f.nums
paste ? # each loop will attach additional column to the created file $f.nums, how to do this???
done (1 Reply)
Hi,
I have a requirement where I need to append the runtimes of the jobs for every run.
I have some 100 jobname and it will be static in output(1st column) . Everyday I need to run my script to find the runtimes for that day and add the entire 100 runtimes to the right of those 100 jobs(2nd... (19 Replies)
Hi i have a file with follw data
"20090427","0","","16371311","-100200","","","","16371311","JUL","09"
In the 10th column i need to convert the month name into month number in this case JUL will be 7 and append the 10th and 11th column which shows me the output as 709. Can you suggest a shell... (11 Replies)
Hi
In a tab delimited file how can I add a column that have values concatenated from all columns.
For example
input.txt
test1 test2 test3
zz2 mm uu
pp3 yy kk
ss2 tt ll
zz3 mm uu
pp23 yy kk
ss3 tt ll
11e 22 44
33c 22 99
output.txt
test1 test2 test3 reslt (6 Replies)
Hello everyone,
I searched the forum looking for answers to this but I could not pinpoint exactly what I need as I keep having trouble.
I have many files each having two columns and hundreds of rows.
first column is a string (can have many words) and the second column is a number.The files are... (5 Replies)
Hi all, I'm pretty much a newbie to UNIX. I would appreciate any help with UNIX coding on comparing two large csv files (greater than 10 GB in size), and output a file with matching columns.
I want to compare file1 and file2 by 'id' and 'chain' columns, then extract exact matching rows'... (5 Replies)
Hi, I have a large data file, want to separate it into 100 part and export one specific field as a file; then I want to append each part's column into one file. How to realize that?
1 2 3 1
2 3 4 2
2 3 4 3
3 3 4 4
3 4 5 5
3 4 5 6
I want the last column of the data file, e.g divide it... (5 Replies)
Discussion started by: wanliushao
5 Replies
LEARN ABOUT SUSE
unbuffer
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)