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@chetan.c: When you say visible, do you mean in ps output or defined in the script?
You can invoke sqlplus without logging in but calling a .sql-commandfile and use the SQL*Plus connect command to...

Obscuring it isn't much help. You have to be able to retrieve it, and anything you can retrieve, so can anyone else.

Putting it in variables won't help, it'll still be visible in ps.

HI , you may define the username and password in profile and make it restricted.
Then you may use the variables against the username/password.

But I am sure that others on this portal may come...

What is your requirement?
With trig=`ls /home/trig.tch |wc -l`, It will always give 1 if file is there.

Do you want to call the function only if file exists?


EDIT: Similar solution already...

It is because your trig variable gets defined on start with value.

While loop then executes, but after you delete that file, the variable is still the same inside the script.

Don't use wc -l,...

"trig" value doesnt change in loop..and processes goes on.
deleting the trigger file doesnt cause to any change..because of , the trig value is assigned to a value (..wc -l) and not be considered...

Command substitution is almost always the wong way to get a list of files. Instead, feed the output of ls to a loop:

ls -c |
while IFS= read -r dir
do
[ -e "$dir/processing" ] && continue...

Try

for i in $(ls -1Frt|grep '/$'|tr -d '/$')
do
#### processing with directory i ####
done

Your program already does use multiple processes -- the tr happens simultanelusly -- but it's a bit of a waste really, since doing it in that fashion isn't faster than doing it inside awk.

awk is...

(sem is part of parallel) You may want to limit the number of files running at the same time to avoid eating the system when other users want resources:

for dir in `find /home -type d -name...

Hi.

Here is a sample use of GNU parallel that counts file contents with wc:
#!/usr/bin/env bash

# @(#) s1 Demonstrate multiple processes simultaneously, with "GNU parallel".

pe() { for...

Try: for dir in `find /home -type d -name "Folder*"`; do
first $dir &
done

Sorry, no.

gzip doesn't work that way. You can't really seek inside a gz file, for starters, because you can't use a partial file -- any of the bytes are meaningless without the others. And one...

you can use 'file' to find out. read the man page file(1) and magic(5) for more

$ file ace.png
ace.png: PNG image data, 725 x 111, 8-bit/color RGB, non-interlaced

$ mv ace.png ace.tla

$...

Beyond a certain point you can't improve the performance of running gzip thousands of separate times to process tiny strings. This might be some improvement since awk is replaced by pure shell...