I'm having a question about for loops. (bash)
I have the following for example:
for file in `ls *.txt`
do
read file ...
done
Now when there is a file present there is no problem, now when there is no file present I get the following output in my standard mail box : "No such... (4 Replies)
Hi
We had 3 server -hp112and hp146 here hp112 is production server and hp146 is staging server used for load.
when i am trying to run follwing command
rcp abc hp112:/dnbusr1/gbid/gbid02 it's trowing an error :-
remshd: Login incorrect.
But same command is working wise versa -
rcp abc... (1 Reply)
Hi all,
How can i use the below unix command in AWK . Can any one please suggest me how i can use.
sed -e "s/which first.sh/which \$0/g" $shell > $shell.sal
where $0=current program name(say current.sh)
$shell=second.sh (1 Reply)
how can i make one script fail if some condition is not satisfied.i m writing if ..else logic in script.i need some standard command to do that ,, (1 Reply)
Hi Guys,
I am trying a simple for loop which is throwing an error.
Below is my code:
#/bin/sh
set -A array "are" "you" "there";
for ( i = 0 ; i < ${#array} ; i++ )
do
echo ${array}
done
I am getting this error
tci001wasd02 $ sh -vx array_for.sh
#/bin/sh
set -A array "are"... (6 Replies)
How to use Mailx command in unix shell script, its throwing below error
#!/bin/ksh
let x=3
If ; then
mailx -s “ $x is greater than 2” example@gmail.com << EOF
This is the message body
EOF
fi
its throwing error as syntax error at EOF... (10 Replies)
The code at the bottom is a simplified example of what we have.
If I use the following:
&& echo "echo failed"
$? returns 1
When I use
if ; then echo "echo failed" ; fi
$? returns 0
Does anyone know what's wrong with this?
Using AIX 6.1 and KSH
for NUM in 1 2 3
do
... (5 Replies)
Hi all,
I ahve a program which has to delete a line in a file... if i run the sed command through shell prompt it works fine. But if run it using code its throwing error. May i know where i am doing wrong.
the file has 3 lines
# cat /root/.ssh/known_hosts... (4 Replies)
Hello Gurus,
I am writing one script at linux.
The logic is
There is a find command which will find some specific files daily and store at a variable
Then echo that variable .
Now when I am trying to read the variable by using for loop it is throwing error as below:cat: CKDT.dat: No such... (5 Replies)
Hi all,
I am running a curl statement in my script to extract some information form a remote server.
My curl statement is :
curl --socks5 142.133.134.164:1082 'http://11.229.52.71:8011/WebApp/common/version'
This gives me an output of :
$ curl --socks5 142.133.134.164:1082... (3 Replies)
Discussion started by: Junaid Subhani
3 Replies
LEARN ABOUT SUSE
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)