Hi,
I have a file which contains the following :
select * from test where test_id=1;
select id
from test1, test2 where test_id=1 and test_id=2;
select * from
test1, test2, test3 where test_id=4 and test2_id where in (select test2_id from test2);
select
id1, id2 from test ... (6 Replies)
Hi all,
I am looking for a coomand to search for the keywords in susequenct lines. Keyword1 in a line and Keyword2 in the very next line.
Once i found the combination ineed to print the lines with patterns and the line above and one below.
I am giving an example here: Keywords are :ERROR and... (12 Replies)
Hi,
I'm the new user of linux/unix. Can I ask that anybody know how to use the linux/unix shortcut key to search a specific file from a list of directory?
For example, I know the file name that I want to search. But I forget which directory or location is my desired file put.Got any shortcut... (7 Replies)
I have a huge list of files in an Unix directory (around 10000 files).
I need to be able to search for a certain keyword only within files that are modified between certain date and time, say for e.g 2012-08-20 12:30 to 2012-08-20 12:40
Can someone let me know what would be the fastest way... (10 Replies)
have a very big file where need to format it like below
example file:
abcd today
is
great
day;
search keyword 'abcd' and append to it all words till we reach ; to make it a single line.
output should look like.
abcd today is great day;
There are many occurrence of such... (2 Replies)
Hi ,
I have been trying to write a perl script to do this job. But i am not able to achieve the desired result. Below is my code.
my $current_value=12345;
my @users=("bob","ben","tom","harry");
open DBLIST,"<","/var/tmp/DBinfo";
my @input = <DBLIST>;
foreach (@users)
{
my... (11 Replies)
I have ~100 text files in a directory that I am trying to parse and output to a new file. I am looking for the words chr,start,stop,ref,alt in each of the files. Those fields should appear somewhere in those files. The first two fields of each new set of rows is also printed. Since this is on a... (7 Replies)
Hi All,
I hope somebody would be able to help me.
I would need to search a string coming from a file, example file.txt:
dog
cat
goat
horse
fish
For every string, I would need to know if there are any files inside a directory(recursively) that contains the string regardless of case.... (9 Replies)
Discussion started by: kokoro
9 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)