Hi
How to create a directory structure with getting input from a file.
I have file in that following lines are written.
./activemq-4.1.2/activemq-core-4.1.2.jar
./activemq-4.1.2/backport-util-concurrent-2.1.jar
./camel-1.4.0/apache-camel-1.4.0.jar
./camel-1.4.0/lib/activation-1.1.jar... (12 Replies)
I am using a large unix server at my college. I have remote access to it on my laptop. I have installed a program on the large unix server, and want to write to the program. How do I alter parameters to read input and write output somewhere else?. I would like to read input and write output to my... (2 Replies)
Hi,
I have a data file looks like the following
ID STARTDATE ENDDATE
101 20090520 20090521
102 20090521 20090522
103 20090522 20090523
104 20090523 20090524
105 20090524 20090525
106 20090525 20090526
107 ... (3 Replies)
Being new to this area .I have been assigned a task which i am unable to do . Can any one please help me .
Hi I have requirement where i have input file XYZ_111_999_YYYYMMDD_1.TXT and with header and series of Numbers and Footer.
I want to create a mutiple output files with each file having a... (2 Replies)
I am looking help in awk, quick overview. we will get feed from external system . The input file looks like below.
Detail Id Info Id Order Id STATUS Status Date FileDetail
99127942 819718 CMOG223481502 PR 04-17-2011 06:01:34PM... (7 Replies)
Hi All,
I need help for doing the following.
I have a input file like:
aaaaaaaaaabbbbbbbbbbbbbbbbbbbb
cccbbbbbaaaaaadddddaaaabbbbbbb
now I am trying to generate a output csv file where i will have for e.g.
0-3 chars of each line as the first column in the csv, 4-10 chars of the line as... (3 Replies)
I have file A.txt
File A
1,Hi,234
2,Hello,345
1,Kal,980,
9,KJ,098
2,de,098
..
...
I have more then 600 lines...
I want separate the files as per 150 line.
First 150 lines ----File A1.xtx
Second 150 lines ---File A2.txt
Third 150 lines----File A3.txt.
... (4 Replies)
Hi,
I was having the following issue
cat input
hello1, my name is unix.com. I am awesome. Hope you know this, hello2!
cat hello1.txt
Hi Friends
Hi Folks
Hi Well-Wishers
cat hello2.txt
Honey
Sweety
Darling
Required Output (8 Replies)
In the below bash a file is downloaded when the program is opened and then that file is searched based on user input and the result is written to a new file.
For example, the bash is opened and the download.txt is downloaded, the user then enters the id (NA04520). The id is used to search... (5 Replies)
I have a file number.txt.I need to get 2 inputs from the terminal like a=100 and b=200.If a and b are there in the file,then check if a < b,print "less".If a is not there in the file,print "a is missing" or if b is not there in the file,print "b is missing".
number.txt:
100 200 300 (2 Replies)
Discussion started by: aneeta13
2 Replies
LEARN ABOUT LINUX
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)