01-16-2008
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
I have 5 files in a directory.
emp1_usage.txt
emp2_usage.txt
emp3_usage.txt
emp4_usage.txt
emp5_usage.txt
I am using sqlldr to get the contents of the above 5 files and store it in a temp table and update my original table using temp table.
for f in *emp*.txt
do
sqlldr... (3 Replies)
Discussion started by: pathanjalireddy
3 Replies
2. UNIX for Dummies Questions & Answers
Hi,
I was wondering if there was a way to append something to filenames based on a wildcard. For example, if I have the following files in a directory:
blah1
blah2
blah3
blah4
blah5
I want to rename these all to:
blah1.txt
blah2.txt
blah3.txt
blah4.txt
blah5.txt
Is there a... (4 Replies)
Discussion started by: Djaunl
4 Replies
3. UNIX for Dummies Questions & Answers
Hi
I would like to know how to search through a directory and pull out files that has a specific pattern in the filename. For example if the filename has "bsc" in it, then that file must be moved to another directory where I will perform some operations on it. I know grep can be used, but I'm... (17 Replies)
Discussion started by: ladyAnne
17 Replies
4. UNIX for Dummies Questions & Answers
Hello all,
i have tons of files in folder named like this (yyyymmdd):
bookcollection20100729
bookcollection20100730
bookcollection20100731
bookcollection20100801
bookcollection20100802
etc.
I need to find files with date range in there names lets say from 2010.07.30 - 2010.08.02
... (10 Replies)
Discussion started by: Whit3H0rse
10 Replies
5. Shell Programming and Scripting
without using conventional file searching commands like find etc, is it possible to locate a file if i just know that the file that i'm searching for contains a particular text like "Hello world" or something? (5 Replies)
Discussion started by: arindamlive
5 Replies
6. UNIX for Dummies Questions & Answers
Hi,
I have got some 10 filenames stored in a file or displayed in the console as a result of some query i made.. Now I need to open each of these files and search for a pattern in these 10 files.. Can someone help me with this?
Thanks,
Jean (9 Replies)
Discussion started by: jeanjkj
9 Replies
7. Shell Programming and Scripting
I have some html with hrefs that contain local links to pdf filenames. These filenames should have standardised names, i.e. there should be a label prior to the ".pdf" filename suffix. There can be many of these links on a single line of text and some may already have the label. For example
... (13 Replies)
Discussion started by: adb
13 Replies
8. UNIX for Advanced & Expert Users
OS: RHEL 5.8
shell: bash 3.2.25
Directory /home/guest/ contains these files:
file a
file b
file c
fileD
fileE
fileF
testFile.txt
I'm trying to find the syntax to run ls -ltr against this list of files that is contained within a text file, testFile.txt.
The file testFile.txt has... (4 Replies)
Discussion started by: uschaafm
4 Replies
9. Shell Programming and Scripting
Hi,
We are doing some migration work. The same files may exist in different partition/mountpoints. We may place it in a single place, hence we don't want any duplicates...we will rename the file names if we know the files which has duplicates(by file name)).
It would be nice if a script... (3 Replies)
Discussion started by: saravanapandi
3 Replies
10. Shell Programming and Scripting
So I'm grepping for the following right now:
ls -la /somedirectory/*.log* | awk '{print $9}'
The problem with this is that I get the following output:
/somedirectory/errors_1_foo.log
/somedirectory/errors_1_foo.log.1
/somedirectory/errors_1_foo.log.2... (4 Replies)
Discussion started by: LinuxRacr
4 Replies
LEARN ABOUT CENTOS
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)