Help with addition of 2 numbers that are read from a file Post: 302449351

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Top Forums Shell Programming and Scripting Help with addition of 2 numbers that are read from a file Post 302449351 by marmik1903 on Monday 30th of August 2010 10:11:06 AM

08-30-2010

Registered User

Help with addition of 2 numbers that are read from a file

I am trying to add free and used memory (so that i can compute percentage used)of remote nodes using shell script. I use the openssh-server,expect tool and ssh script.

1)login.txt (info of nodes):
ip1|username|password
ip2|username|password
.
.
.

3)sshlogin.sh

Code:

#!/bin/bash 
FILE=login.txt
CONNECT=./sshlogin.exp
exec 0<$FILE
while read line
do
MyServer=$(echo $line | cut -d'|' -f1)
MyUser=$(echo $line | cut -d'|' -f2)
MyPassword=$(echo $line | cut -d'|' -f3)
$CONNECT $MyPassword $MyServer MyUser>$MyServer.txt
grep buffers/cache $MyServer.txt>mem.txt     
MEMFILE=mem.txt         
exec 0<$MEMFILE
while read line
do
used=$(echo $line | cut -d' ' -f3)
free=$(echo $line | cut -d' ' -f4)
total='expr $used + $free'  #This is my headache can't see 
# what is the problem
echo $used 
echo $free
echo $total
done
done

3)sshlogin.exp:

Code:

#!/usr/bin/expect -f
# set Variables
set password [lrange $argv 0 0] 
set ipaddr [lrange $argv 1 1]   
set username [lrange $argv 2 2] 
set timeout -1   
# now connect to remote UNIX box (ipaddr) with given script to execute
spawn ssh $username@$ipaddr
match_max 100000
# Look for passwod prompt
expect "*?assword:*"
# Send password aka $password 
send -- "$password\r"
# send blank line (\r) to make sure we get back to gui
#send -- "\r"
expect "$"
send -- "free -k\r"
expect "$"
send -- "exit\r"
expect "logout"

I am using this to determine if the nodes should be turned off if the memory utilization is below certain threshold.

marmik1903

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x2sys_merge

X2SYS_MERGE(1gmt)					       Generic Mapping Tools						 X2SYS_MERGE(1gmt)

NAME

       x2sys_merge - Merge an updated COEs tables

SYNOPSIS

       x2sys_merge -Amain_COElist.d -Mnew_COElist.d

DESCRIPTION

       x2sys_merge  will read two crossovers data base and output the contents of the main one updated with the COEs in the second one. The second
       file should only contain updated COEs relatively to the first one.  That is, it MUST NOT contain any new  two  tracks  intersections  (This
       point  is  NOT checked in the code). This program is useful when, for any good reason like file editing NAV correction or whatever, one had
       to recompute only the COEs between the edited files and the rest of the database.

       -A     Specify the file main_COElist.d with the main crossover error data base.

       -M     Specify the file new_COElist.d with the newly computed crossover error data base.

OPTIONS

       No space between the option flag and the associated arguments.

       EXAMPLES
	      To update the main COE_data.txt with the new COEs estimations saved in the smaller COE_fresh.txt, try

	      x2sys_merge -ACOE_data.txt -MCOE_fresh.txt > COE_updated.txt

SEE ALSO

       x2sys_binlist(1), x2sys_cross(1), x2sys_datalist(1), x2sys_get(1), x2sys_init(1), x2sys_list(1), x2sys_put(1), x2sys_report(1)

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