Hi,
I need to remove lines from a text file that are less than certain length in UNIX. For example, test.txt file contains the following lines:
abcdefghijklmnopqrstuvwxyz.
123456789009876543211234567
This line to be removed.
zyxwvutsrqponmlkjihgfedcba.
The length of each line is supposed... (5 Replies)
I am a new unix user & I wanted to work with unix as it is very good in text manipulations. I need a little help. I will be grateful if someone can help me out.
I need help in grepping a pattern of numbers from one file to another file. Specific details are as follows:
File one contains only... (4 Replies)
Hello,
I have mysql binary file which logs all the database queries and i to insert all queries log in to database. First i coverted binary file to text file. and start playing with it. Text file contains following queries, some samples are,
SET INSERT_ID=1;
INSERT INTO test... (0 Replies)
What I am trying to do is make a script that will add a port number within a section of a file if it already doesn't exist in that section of the file. The particular line that I would like to add the port number to in the file is formatted like this:
TCPPORTS="25 80 125 443 8080 10000"
For... (3 Replies)
Hi,
I need to write shell script for the scenario explained below -
datafile.txt
AcctNum,code,Region,,,,
12345451,AN ,abaab
12345452,AN ,xccxc
76677545,RP ,acxcc
43567878,RP ,afghh
32190900,AN ,afrfrf
87312345,AN ,aqaw
I have a text file (datafile.txt)... (1 Reply)
Hi ,
I have a simple text file with contents as below:
12345678900 971,76 4234560890
22345678900 5971,72 5234560990
32345678900 71,12 6234560190
the new csv-file should be like:
Column1;Column2;Column3;Column4;Column5
123456;78900;971,76;423456;0890... (9 Replies)
Hi
I have a requirement to write a script but not sure which is the best way to approach this
I have not worked in sed but I'm aware that its robust for file extraction requirements
I have a scripting task. I already developed the code in perl but the script is taking almost 2 mins for... (5 Replies)
I have a tab delimited file with 4 columns. If the value in the first column, equals the value in the second column, I'd like to have the 4th column multiplied by 2 then add 1. If the value in the first column differs from the value in the second, I'd like to have the 4th column multiplied by 2... (5 Replies)
Hello,
Supposing I had a huge list as follows:
TAC manufacturer Device Type
1392600 LG D959 LG-D959TS FeaturePhone
1409700 LG V410 FeaturePhone
35150806 LG F350S FeaturePhone
35165206 Samsung GT-E1200 FeaturePhone
35194505 Nokia Asha 200 FeaturePhone
but I want to make it look like... (3 Replies)
Discussion started by: Cludgie
3 Replies
LEARN ABOUT DEBIAN
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)