Unix and Linux Tips

Minggu, 13 Juni 2010

Unix Tip: PROGRESS STATUS IN XTERM TITLEBAR

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3050 - June 13, 2010

http://www.ugu.com/sui/ugu/show?tip.today

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PROGRESS STATUS IN XTERM TITLEBAR

Sometimes it is handy to be able
to show some information in the
xterms title bar, for example
if you download a set of large
files (thereby producing lots
of meaningless information on
the terminal) and you want to
know which file is actually
beeing downloaded.

For this purpose, I hacked a few
lines of shell code that would
put any information into the
xterms title bar. I called the
script ttshow.

#!/bin/sh
if [ -z $DISPLAY ]; then
echo "ESC]0; $* ^G"
fi

In this little script, the
string ESC has to be replaced
by one real escape character
(ascii 0x1b), the string "^G"
has to be replaced by a bel
character (ascii 0x07).

Now I can make my scripts like
this:

for file in in `cat filenames`; do
ttshow "downloading $file"
wget $file
done

..and it will tell me on the
first glance what it's doing.

For more information about
this, unpack the X distribution
and search for the file
ctlseqs.ms - this file belongs
to the xterm distribution and
contains all the escape
sequences xterm knows about.

This tip generously supported
by: ulinzen+ugu@sendmail.com

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Sabtu, 12 Juni 2010

Unix Tip: HP-UX REMOVE UNUSED SPACE

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3049 - June 12, 2010

http://www.ugu.com/sui/ugu/show?tip.today

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HP-UX REMOVE UNUSED SPACE

To remove unused s/w and free
disk space in hp-ux use the
command:

freedisk [-a n] [-v]

Note: See man page for this
before executing this..

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
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Jumat, 11 Juni 2010

Unix Tip: FILE SYSTEM CAPACITY ALERT

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3048 - June 11, 2010

http://www.ugu.com/sui/ugu/show?tip.today

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FILE SYSTEM CAPACITY ALERT

#!/bin/sh
# This script can be used to
# warn the users that
# the file system is getting full
#
# Script needs adjusted for your
# needs. Below is set to monitor
# all the file systems mounted and report to
# RECEIVER
#
# Usage: as a cron entry for best use.

RECEIVER=nachiappan.ramanathan@aig.com

for fs in `df -k|awk '{print $1}'|sed -n "3,14 p"`
do
x=`df -kl | grep $fs | awk '{ print $5 }'`
y=50%

if [ $x -gt $y ]
then
message="File System `df -k |grep $fs |awk '{print $6\",
\"$5}'` Full!!!"
echo $subject
echo $message | mailx -s "`hostname` - File System Full
Warning !!!" $RECEIVER
fi
done

This tip generously supported by:
Nachiappan.Ramanathan@aig.com

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
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Kamis, 10 Juni 2010

Unix Tip: Tru64 STTY DEC

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UNIX GURU UNIVERSE
UNIX HOT TIP

Unix Tip 3047 - June 10, 2010

http://www.ugu.com/sui/ugu/show?tip.today

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Tru64 STTY DEC

On Tru64 Unix (at least on 4.0F),
some non-root-user drop an error
message on the root's Mail
account when cronjobs used

su - foo -c /usr/bin/bar

Even some Compaq technicians could
not tell that this results from
terminal settings in the .profile,
which are invalid on non-interactive
terminals. The error messages
(2 in fact) looks like this:

stty: tcgetattr: not a typewriter
Not a terminal.

The solution is to wrap commands
like "stty dec" and "tset -I -Q"
with a check on terminal capabilities:

if tty -s
then
stty dec
tset -I -Q
fi

This tip generously supported by: nils@poppendiek.de

Unix Guru Universe - www.ugu.com - tips@ugu.com - Copyright 1994-2001
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