09-02-2008
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi,
I have one txt file as bellow:
Inspector logging xxxxx xxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxx Inspector logging xxxxxxxxxxxxxx
xxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxx Inspector loggingxxxxxxxxxxxxxxx
Inspector logging xxxxx xxxxxxxxxxxxxxxxxxxxxxxx
I want... (1 Reply)
Discussion started by: redlotus72
1 Replies
2. AIX
I am new to unix...
How to get all the saturdays of a specific year?
for a specific month, i tried as below..
cal 02 2006 | awk '{print $7}'
but it is not giving all saturdays....
can anyone help me with this?
Thanks in advance,
Sumi (9 Replies)
Discussion started by: sumi
9 Replies
3. UNIX for Advanced & Expert Users
PLEASE EXPLANIN ME...
sed 's~\(.*\)\(<name>\)\(.*\)\(</name>\)\(.*\)~\2\3\4~'
this is the format
<start><name>123<\name><addr>BAC<\addr><loc>sfo<\loc></start> (1 Reply)
Discussion started by: gksenthilkumar
1 Replies
4. UNIX for Dummies Questions & Answers
Hi,
I am trying to understand a script and found a line as follows:
tr '\211\233\240' '\040' < $IN_FILE | tr -cd '\11\12\15\40-\176' > $TEMP_FILE
Can any one explain the above line .. What are they trying to translate using the tr command.. I have not used tr command.. so feeling little bit... (2 Replies)
Discussion started by: risshanth
2 Replies
5. Shell Programming and Scripting
shudnt this command :
grep test
give all the lines which do not hv 'C'. ^ wrks as negating character inside square brackets right ???
bt in my case grep is printin all the line in the file
also wht does
grep c+ test & grep c? test
shud do ??? (4 Replies)
Discussion started by: evergreen_cool
4 Replies
6. Shell Programming and Scripting
Hello,
I want to search for a file/directory named "abc" which is located anywhere in the given unix system.
I am using the command :-
But the problem is that this is giving me all combinations of files with have 'abc' in their name. But can I know the option to be used to get the location... (5 Replies)
Discussion started by: nsharath
5 Replies
7. Shell Programming and Scripting
Hi
I need to grep a particular world like and redirect into a temporary file .But while iam grepping some unwanted data are aslo coming like .ex In a FILE all these TABLENAMES are present .
module_table1,module_table2, module_table3,module_table5, module_table1_temp , module_table2_temp... (9 Replies)
Discussion started by: mani_isha
9 Replies
8. Shell Programming and Scripting
Hi,
What is the difference in capitalizing the option 'i' of xargs command, (i.e) xargs -i and xargs -I?
Also, what is the difference between the below 2 commands?
output_from_cmd | xargs -I {} grep '{}' file
output_from_cmd | xargs -I grep '{}' file
Any efficiency or performance... (4 Replies)
Discussion started by: royalibrahim
4 Replies
9. UNIX for Dummies Questions & Answers
dear users and experts,
i am stuck withis command and i am unable to understand what is it doing??
ls -d * (7 Replies)
Discussion started by: seshank
7 Replies
10. Shell Programming and Scripting
Hi all,
I need to find the line by using grep command with the two occurence of word in the same line. I tried the below example it prints the word choice.
cat nohup.out
Dictionary utl is completed.
file is completed.
Dictionary file is completed.
grep 'Dictionary\|file'... (0 Replies)
Discussion started by: arun888
0 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)