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While city and metro areas are well served, over 50% of the USA is lucky if they have dialup access to the internet. I have relatives that only got dialup in the last few years.

While out...

For additional detail, check the bash man page sections on special characters and expansions. The technical term is "globbing", and is also referred to in nearly any discussion of "regular...

Is it that the script itself is slow, or that something it calls or starts takes a long time to return?

If it is the script itself, you can built something into the script, just as the date...

Aside from what you already know (RSH bad, Mongo not use! Eat SSH instead.) the better way to secure RSH is to combine hosts.allow and hosts.deny so that only the AUTHORIZED stations can use it and...

1. Always check that you are using the correct tools. Sed is a stream editor, and is wonderful for making on-the-fly edits. What you want, though, is to select or deselect lines to retain. ...

For this compare you may wish to parse the strings from one of four integer fields internal delimited by '.' and into an array of four integers. At that point you can cascade compare by order to...

In answer to that question, there is no DIRECT way to compile a shell script. There ARE ways to PACKAGE a shell script, but to truly COMPILE a shell script? None that I know of.

My own methods...

Have you looked into the options for the FIND command? It is not completely clear what environment you are workign in, but between date and find you should be able to loop through and move the files...

Perl is available for any box that can run the GNU compiler suite. That does not eliminate many systems. Available does not mean installed though. IF there is some odd corporate standard...

It depends upon your platform and long-term goals. Generally, because it is portable nearly everywhere, I would advise PERL. Longer term: BASH and/or KORN as well. There are things that PERL is...

why not try something like:


or something of the kind. The exact formatting is not critical, but that it be correct html or xhtml to display properly when written to the html page and rendered...

What you say does not make the need clear. WHY can you not access the console? Do you mean REMOTE console access, or is there a problem logging in at the local keyboard? Does the monitor display a...

or
find /home -name '*.msh' -print 2>/dev/null

It will find all of the files with that extension that you have access to, and pipe the errors to the bit-bucket.

I cannot compare Python, as I do not use snakes here. ;-)

Bash is easy and (in version 4) remarkably complete for a shell. Shell scripting starts with automating exactly what you would do on the...

Ping varies over platforms and versions, but it tends to return a code that is reliable to consistent so that 'if ping ${target}' works.


You do need to be more clear and complete with such...

In general, even where the TZ environment variable is not set (as in several flavors of Linux based distributions) the utilities respond once if it is found in the environment when they run.

You...

Please, if you do not mind my asking, WHY are you trying to parse the CPU idle from the top command? There are better/easier ways to get the cpu idle figure. IS there some contraint that you MUST...

You might try a script: like
#!/bin/bash
# precat : cat a file with the filename prepended to each line
FILE=$1
if [ -z "$FILE" ] ; then
echo " no file specified, and I do not care to...

At first glance I thought this would be easy, but tratting the output of any command expressing this code to the XTERM window successfully in 'interesting'. It is far easier to record environment...

Why not something simple, like
for foo in 0 1 2 3 4 5 6 7 8 9 10 ; do
echo "Count is ${foo} "
pwd
ls -l
sleep 30
done


if you are going to iterate over a known and manageable...

Well, you set the variable to 0 and then loop while it is >= 11.
It will, quite correctly, loop exactly 0 times.
Try chaning the >= to <= and see what happens.

#!/bin/ksh
# the one-ring script
# to start them all

# a variable to hold all of the script names
SCRIPTLIST="script1
script2
script3
...
script20"

# start all child scripts...

This idea works. Note the comments, many are lines I used to determine what was going on when I had a typo. If you think FOREGROUND typos are fun, wiat until you have some in the BACKGROUND!
Note...

Well, if you want real-time response do not wait upon 'wait'!
Again, there are several solutions.

One easy one is to spawn all of your sub-processes, capturing each PID into a list and the output...

If you need the child processes to calculate or aquire data and exit, leaving the data for the parent, then files are appropriate. If you need the child processes to continue running and gathering...