Hi
I have only ever used awk and sed for basic requirements up until now.
I have had to break a log down for multiple purposes.
Using awk, sed and a date script. I am left with this:
(message id, time of msg attempt, message id, domain name, time of msg completion)
... (4 Replies)
I am tryin to figure out how to extract interested text from file
example.txt
blah blah
blah a: child1
blah a: child2
blah b: parent1
blah blah
blah ....
blah a: child21
blah a: child22
blah a: child23
blah b: parent2
this kinda text repeats .. number of children is... (6 Replies)
Hello unix.com people!
How can I modify a text in format:
A:B:C
A:B:C
A:B:C
into
C/A/B
C/A/B
C/A/B
Note: Text is line by line and "C", "B", "A" fields are different each row.
Thanks in advance. (7 Replies)
Hello again unix.com
How can I extract from a large file in format:
steve@aol.com steve hawkins Location of this member is bla bla bla
sun@hotmail.com Sun Ying This member is using browser bla bla bla
to another text in format:
steve@aol.com steve hawkins
sun@hotmail.com sun ying
... (5 Replies)
Hi Everyone,
I was wondering if someone could help me to transform my data into a format I need.
Here is an example of what my data looks like
E F G H
A 1 2 3 4
B 5 6 7 8
C 9 1 2 3
D 4 5 6 7
and this is what I would need it to look like:
AE 1
BE 5
CE 9
DE 4
AF 2
BF 6
CF 1 (6 Replies)
Hello, I am a very novice user of awk, I have a set of files named file001, file002, file003, file004, etc., each contains four fields (columns of data) separated each by a uneven number of spaces. I want to substitute those spaces by a TAB, so I am using this line of awk script:
awk -v OFS="\t"... (4 Replies)
Hello unix.com
I'm having trouble with a text file.
It looks like this:
Alvaro Costa Daldit Kaur Sings Brian G Heward
Desmond Ogilvie John Der William Gherasim
Lance Mackey Donald Kopplin Robert Mckinlay
Jahir Hussain Mohamed Jack Benaim Abraham Weiss
I want... (7 Replies)
Hello again unix.com,
I have a text file in this format (line-by-line):
hostname id password
hostname id password
hostname id password
hostname id password
I want it to become:
hostname id password
hostname id password
hostname id password
hostname id password (4 Replies)
Discussion started by: galford
4 Replies
LEARN ABOUT DEBIAN
expect_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)