Mailbag

Answered by: Rick

> from the Control Center select Appearance & Themes. Choose 
> Background from the sub-menu. Yeah, Background. Who knew?

DestroyFunc StartFunction
AddToFunc   StartFunction
+ I Test (Init) Exec exec my_application

+ I Exec exec my_application

> One of these apps issues a FvwmCommand. Does it take time for the
> FvwmCommandS FIFO server to start up before being reasonably able to
> begin issuing commands?

DestroyFunc StartFunction
AddToFunc   StartFunction
+ I Module FvwmEvent some_alias
+ I Test (Init) Exec exec feh --scale-bg some_image.jpg
+ I Test (Init) Exec exec xteddy -wm
+ I Module FvwmCommandS
+ I FvwmCommand 'Function myfunction'

DestroyFunc  StartFunction
AddToFunc    StartFunction
+ I Module FvwmEvent some_alias
+ I Test (Init) Exec exec feh --scale-bg some_image.jpg
+ I Test (Init) Exec exec xteddy -wm
+ I Module FvwmCommandS
+ I Schedule 900 FvwmCommand 'Function myfunction'

+ I PipeRead 'sleep 5 && echo "Function myfunction"'

+ I Exec sh -c 'sleep 3 && exec my_application'

> I ask this because I noticed that the FvwmCommand fails ... but then
> if the app issues it some time later it succeeds. Kinda strange ...
> should my app actually wait some time to give Fvwm time to finish it's
> initialization?

SetEnv myvariable 200

PipeRead 'echo SetEnv mynewvar $(($[myvariable] + 1))'

SetEnv mynewvar 201

SetEnv y PipeRead "echo $[2*$[x]]"

$ apt-cache search circuits

$ apt-cache --names-only search circuits

$ apt-cache install <name>

$ sudo apt-get update

$ sudo apt-get remove <name>

$ sudo apt-get --purge remove <name>

$ apt-cache showpkg x-window-manager

-- 
Cheers,                        The Technical Support Credo:  
Rick Moen                      Remember, there are no stupid questions, 
rick at linuxmafia.com            only stupid people asking questions.

> User-Agent: KMail/1.7.2

ben at Fenrir:~$ cat /usr/share/perl/5.8.8/pod/*|grep -c $
156874

#!/usr/bin/perl
open(INFILE,  "calendar")   or die "Can't open input.txt: $!";#outta curiosity, can INFILE be changed to another name, like CALFILE or something?
$searchme = shift;
#This just grabbed the search term from the command line. How do you get more than one term? must find out...
while (<INFILE>) {
       print if /$searchme/; #searches thru the file for the searchterm
    }
print "\n";#this just spits out a newline when all is done, so that the last result doesn't immediately precede the commandline.

> #outta
> curiosity, can INFILE be changed to another name, like CALFILE or
> something?

> $searchme = shift;
> #This just grabbed the search term from the command line. How do you
> get more than one term? must find out...

# Actually removes the elements from @ARGV
$a = shift;
$b = shift;
$c = shift;

# Does not remove, just copies them
( $a, $b, $c ) = @ARGV[0, 1, 2]

1) igpay atinlay
2) morse
3) that code one of the previous adventures came up with for the
spam-proof emails? (I think it was the one with the government
officials who extracted sysadmin or someone like that...)

------------- Start get_ip.sh ---------------
#!/bin/bash

IP=`host blah.dyndns.com`

# This reads in the OLD IP address he had
read OLD < OLD_IP.dat

# Get the current IP address
if [[ $IP =~ '(.*)has address (.*)' ]]
then
   if [ "$OLD" != "${BASH_REMATCH[2]}" ]# Didn't match so the IP changed
    then

# So We log the current date/time and the new IP to a file

      echo `date` ": Removing access for" $OLD "and giving access to" 
${BASH_REMATCH[2]} >> access_log.log

# Set the Static firewall rules

      Result=`/home/suramya/bin/S41firewall`

# Create a new rule to allow the current IP address access

      Result1=`iptables -A INPUT -s ${BASH_REMATCH[2]} -p tcp -m tcp 
--dport 22 -j ACCEPT`

# Drop all other connections to port 22

      `iptables -A INPUT -p tcp --dport 22 -j DROP`

# Replace the old IP address with the new one

      echo ${BASH_REMATCH[2]} > OLD_IP.dat
    fi
fi

---------------- End get_ip.sh --------------

egrep '(.*)has address (.*)' <<< "$IP"

>   if [ "$OLD" != "${BASH_REMATCH[2]}" ]
>     # Didn't match so the IP changed 
>   then
>
>    # So We log the current date/time and the new IP to a file
>
>    echo `date` ": Removing access for" $OLD "and giving access to"
>    ${BASH_REMATCH[2]} >> access_log.log

> # Set the Static firewall rules
>
>       Result=`/home/suramya/bin/S41firewall`

> Hi Everyone,
>   Couldn't think of a better title than that, so if it didn't make sense 
> I blame the lack of caffeine.

> ------------- Start get_ip.sh ---------------
> #!/bin/bash
> 
> IP=`host blah.dyndns.com`
> 
> # This reads in the OLD IP address he had
> read OLD < OLD_IP.dat
> 
> # Get the current IP address
> if [[ $IP =~ '(.*)has address (.*)' ]]

ben@Fenrir:~$ host www.dyndns.com
www.dyndns.com          A       63.208.196.66

> then
>    if [ "$OLD" != "${BASH_REMATCH[2]}" ]# Didn't match so the IP changed
>     then
> 
> # So We log the current date/time and the new IP to a file
> 
>       echo `date` ": Removing access for" $OLD "and giving access to" 
> ${BASH_REMATCH[2]} >> access_log.log
> 
> # Set the Static firewall rules
> 
>       Result=`/home/suramya/bin/S41firewall`

> # Create a new rule to allow the current IP address access
> 
>       Result1=`iptables -A INPUT -s ${BASH_REMATCH[2]} -p tcp -m tcp 
> --dport 22 -j ACCEPT`

> # Drop all other connections to port 22
> 
>       `iptables -A INPUT -p tcp --dport 22 -j DROP`

> # Replace the old IP address with the new one
> 
>       echo ${BASH_REMATCH[2]} > OLD_IP.dat
>     fi
> fi
> 
> ---------------- End get_ip.sh --------------

#!/bin/bash
# Created by Ben Okopnik on Fri Jun 23 11:14:59 EDT 2006

old=
new=`host www.dyndns.com|awk '{print $3}'`

[ "$old" != "$new" ] && {
	$HOME/bin/S41firewall
    /sbin/iptables -A INPUT -s "$new" -p tcp -m tcp --dport 22 -j ACCEPT
    /sbin/iptables -A INPUT -p tcp --dport 22 -j DROP
	/bin/sed -i "s/^old=/&$new/" $0
}

grep -o "[[:digit:]]*[.][[:digit:]]*[.][[:digit:]]*[.][[:digit:]]*"
httpdaccess.log > ipaddresses.log

grep -o "[[:digit:]]*[.][[:digit:]]*[.][[:digit:]]*[.][[:digit:]]*"
httpdaccess.log | sort -u > ipaddresses.log | rzip ipaddresses.log

egrep -o '[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+' ./access.log

egrep -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' ./access.log

 C - (now /24) 256 addresses (the first three octets fixed - 111.111.111.xxx)
 B - (now /16) ~65k addresses (the first two octets fixed - 111.111.xxx.xxx)
 A - (now /8) ~16.5m addresses (the first octet fixed - 111.xxx.xxx.xxx)

192.168.1.0/24 - 256 addresses - 24 significant bits with eight bits per
octave resulting in the first three octets fixed as with a class C subnet.

192.168.1.0/25 - 128 possible addresses
192.168.1.128/25 - 128 possible addresses

10.0.0.0/8
172.16.0.0/12
192.168.0.0/16

> One thing I did not do was to remove duplicate entries from the
> output. I should have run this from the shell instead.
>
> grep -o "[[:digit:]]*[.][[:digit:]]*[.][[:digit:]]*[.][[:digit:]]*"
> httpdaccess.log | sort -u > ipaddresses.log | rzip ipaddresses.log

egrep -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' ./access.log | \
sort -u > ./ipaddresses.log && rzip ipaddresses.log

egrep -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' ./access.log | \
sort -u  | rzip ipaddresses.log

> Here is the question: Q5 Using an httpd log (which will be provided
> on the subject forum) write a single command line using a pipeline
> of commands mentioned in The complete guide to Linux system
> administration: Chapter 5 to determine the top ten busiest dates (most
> objects accessed).

tail -n 500 ./access.log | \
egrep -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | \
sort -n | uniq -c | sort -nr -t ' ' -k 1 

tail -n 500 ./access.log | awk  '$1 ~ [0-9]+\.[0-9]+\.[0-9]+\.[0-9]+
{print $1}' \
| sort -n | uniq -c | sort -nr -t ' ' -k 1

[15/Nov/2005:00:18:46 +0000]

tail -n 500 ./access.log | awk 'BEGIN {FS="["}; {print substr($2,0,11)};'

tail -n 500 ./access.log | \
awk 'BEGIN {FS="["} {a=split($2,array,":")};{for (i in array) $1 ~
/array[1]/; print $1, array[1]}'

> My lecturer has asked me to do the following with this file, But I
> cannot get this on one line:

> grep -o "[[:digit:]]*[.][[:digit:]]*[.][[:digit:]]*[.][[:digit:]]*"
> httpdaccess.log > ipaddresses.log

egrep '\<([0-9]{1,3}\.){3}[0-9]{1,3}\>'

> One thing I did not do was to remove duplicate entries from the
> output. I should have run this from the shell instead.

210.49.49.147 - - [18/Apr/2004:22:59:44 +1000] "GET /ASGAP/gif/forest2.gif HTTP/1.1" 200 1857
203.40.195.112 - - [18/Apr/2004:23:01:33 +1000] "GET /ASGAP/gif/bguide.gif HTTP/1.1" 200 288
134.115.68.21 - - [18/Apr/2004:23:03:42 +1000] "GET /ASGAP/gif/forest.gif HTTP/1.0" 304 -
150.214.167.133 - - [18/Apr/2004:23:04:54 +1000] "GET /AFVL/tagasaste.htm HTTP/1.0" 200 3266
203.40.195.112 - - [18/Apr/2004:23:06:03 +1000] "GET /ASGAP/jpg/styphels.jpg HTTP/1.1" 200 5318

IP identd user [dy/mon/year:hh:mm:ss zone] "request" status size

> I figure that we're down to a few possibilities:
> 
> 1. The modem is flaky.
>
> 2. The satellite connection is flaky (my friend has the same system and 
> is NOT having these problems).

> 3. I'm having a software problem. Buffer overflows or something. Which 
> means that a reboot would fix it (sometimes it does).

> 4. I'm having a hardware problem with the on board ethernet. Don't know 
> if a soft reboot would effect this, but the power cycle today didn't.

> Maybe I should have a router in the chain? Not sure what that would
> prove. 

wlan0 	Link encap:Ethernet HWaddr 00:E0:98:49:85:6D
        inet addr:192.168.1.116 Bcast:192.168.1.255 Mask:255.255.255.0
        UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
        RX packets:6042 errors:10 dropped:0 overruns:0 frame:10
        TX packets:6281 errors:0 dropped:0 overruns:0 carrier:0
        collisions:0 txqueuelen:1000
        RX bytes:5052344 (4.8 MiB) TX bytes:955796 (933.3 KiB) 

bob$ ping xplornet.com
PING xplornet.com (207.179.143.226) 56(84) bytes of data.

--- xplornet.com ping statistics ---
7 packets transmitted, 0 received, 100% packet loss, time 6000ms

/etc/init.d/networking restart

#!/bin/ksh
y=0
for w in 1
do
     for z in 1 2 3
     do
          for x in 1 2 3 4 5
          do
               y=$(( ${y} + 1 ))
               echo ${y}
          done
     done
done | grep "somedata" >> /Some/output/file
for x in 1 2 3
do
     echo ${y}
done

done | (grep "somedata" >> /Some/output/file)

> My question is: Is there a way to explicitly tell ksh which side of
> the pipe should get forked? In the above example, I want the right

> side of the pipe forked, but ksh defaults to forking the left side.
> I've Googled "+ksh +pipe +subprocess" (I like the old AltaVista
> Syntax), with no luck. The book UNIX in a Nutshell has been no help. I
> tried putting the right side in parens:
>
> done | (grep "somedata" >> /Some/output/file)

foobar=0
while read line; do
  foobar="$((foobar + 1))"
done < /etc/passwd

echo $foobar

...
          do
               y=$(( ${y} + 1 ))
               echo ${y}
          done
     done
	  for x in 1 2 3
	  do
	       echo ${y} >&2
	  done
done | grep '[0-9]' >> output_file

...
          do
               y=$(( ${y} + 1 ))
               echo ${y}
			   out=`echo "$out $y"`
          done
     done
done | grep '[0-9]' >> output_file

echo $out

$ y=$(($y + 1))
$ echo $y
$ y=$(($y + 1)) | cat
$ echo $y

$ t=7
$ echo $t
$ t=6 | cat
$ echo $t

foobar=0
exec 4<&0 # Best to duplicate STDIN, else it's permenant.
exec 0< /etc/group
while read a; do
  ....
done

exec 0<&4 # Restore STDIN.
exec 4<&- # Close FD 4.

     (echo "#!/bin/ksh"
      echo "y=${y}") > /a/temp/file
done | grep "somedata" >> /Some/output/file
. /a/temp/file
rm /a/temp/file
for x in 1 2 3

bilbrey@vimes:~$ apt-cache search excel | grep excel
w3m - WWW browsable pager with excellent tables/frames support
libdbd-excel-perl - provides an SQL interface (via DBI) for accessing Excel files
libspreadsheet-parseexcel-perl - access information from Excel Spreadsheets
libspreadsheet-parseexcel-simple-perl - A simple interface to Excel data
libspreadsheet-writeexcel-perl - create Excel spreadsheets
plopfolio.app - Clone of Serence's excellent KlipFolio for GNUstep
w3mmee - WWW browsable pager with excellent tables/frames, MB extension

id:2:initdefault:

T4:respawn:/bin/su - some_user -c startx

#!/bin/sh
java /path/to/my_java_application
exec fvwm

chmod 700 ~/.xinitrc

AutomaticLoginEnable=true
AutomaticLogin=your-user

su - my_user -c java /path/to/java_application &

Mailbag

Mailbag

Desktop Icon Text Color under KDE

Linux VMware and Novell

Passwords

FVWM Init

Need help on ...errr.... developing?

An article series I wonder what happened to...

Need some help to check a script for unexpected security issues

Need help with grep

Eth0 debugging Bob van der Poel

Old pipe problem - new twist.

Excel and Serial Port

Running applications at startup