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Hello.

As you can see by checking file's manual page (man file), the file command looks up file signatures in /etc/magic (usually).

That file basically says stuff like "If you see this and this...

Are you going to include "I got these on www.unix.com" in your answers?

Besides, a true SysAdmin doesn't care much about distros,she selects one that's closest to her needs and then tweaks it to...

Hi!

I'm trying to write an X11 application with the Xext extension and I'd like to update window content during/after the vertical retrace so they appear smoothly and don't shear.

I've found...

When mplayer can't find a proper mp3 block header where it expects it to be, it tries to "rewind" back in the data stream to try to get its footing. Sometimes that fails and it then has to walk over...

You might also want to check the manual pages for setpgid() if you really want to dissociate the forked process from the parent.

Should be said: vxWorks isn't Unix.

"UNIX" can mean a lot of things.

Ok, here's what you can do, replace lpr with a script.

First, find out where it lives. Let's say for example it's /usr/bin/lpr.

Then replace with a script...

You also really should put a "sleep 1" in the loop, as executing the date program non-stop like that will eat up your CPU cycles like crazy.

No point in printing the time zillions of times every...

echo $variable | tr " " "\012"

or

for f in $variable; do echo $f; done

Notice that in your ls output, there doesn't seem to be a name for that link. It's possible it's been created with a non-printable character.

Try `ls -lb`

That should list it with...

Here's a way to process more than one variable at a time:

file=somefile
varlist="MOLECULE ECUT"
for var in $varlist ; do
val="`grep \"^$var \" < $file | sed \"s/^$var //\"`"
eval...

Also, depending on the OS and queuing system used, you could write a simple printer filter as a shell script that would do the work for you. So... What OS and printing system are you on?

Actually, you should quote the -name pattern if it contains wildcards, otherwise it'll break if you have more than one match:

$ ls
345test567 768test234
$ find . -name *test* -print
find:...

VARIABLE="`grep MOLECULE < FILE | sed 's/^MOLECULE //'`"
should do it.

cat'ting a file into a pipe is almost never necessary and creates an extra unnecessary process. cat should only be used to concatenate files.

Instead do:

less file

or

less < file

read can separate line content into multiple variables already separated by $IFS, so no need to cut the line:

while read parent id; do
[ $parent = 45 ] && kill $id
done < file

Your buffer utility might not be in your remote shell's non-interactive PATH. You could use the full pathname in your command line so it finds it, like so:

tar cf .... | ssh .......

You can also tell find to find files that are newer than one file.
find . -type f -newer timestamped_file -print
will print all the files that were modified since the last time timestamped_file was...

>&2 re-directs the output to file descriptor 2, which is called "Standard error", a channel used for outputting errors usually.

It's common unix practice.

On Solaris, the proper syntax for the /etc/dfs/dfstab file consists of executable lines that begin with the share command.

Like so: share [-F fstype] [ -o options] [-d "<text>"] <pathname>...

Hi.

Try od -c A.lst , I'm also of the opinion that there's something funky in it.

Also, in your last code example, you didn't replicate the quotes around the grep pattern. Those make a large...