Counting IP Connection Number

Hello, I have an expect script where I ssh to a remote host to determine the network configuration and get from the user the network interface card that should be used. From their response, I determine the subnet mask and save the information to a text file that is later transmitted back to my local host. This is all so that I can set up virtual IP aliasing and verify that the physical IP address of the local and remote host are on the same subnet prior to continuing with the setup. I am running the script on Linux, with expect version 5.45.

The code itelf works just fine, but I'm having some issues with how it displays on the screen. As you'll see below in the example, the default system prompt displays, as does the user input command that I'm sending to the shell from the expect script.

Is there a regular expression or something that I can write to prevent the prompt and command that I'm sending from printing to the screen? I know that it should be suppressed if I have an expect command following the Code:

send -s "\nread n_card?'Enter the network interface card number for this server (i.e. eth0):   '\r

command, but everything I have tried for strings and regular expressions to expect causes the netstat -rn output to not show up all of a sudden. I'm new to expect, so I'm not really sure why this is happening.

I would really appreciate any help/suggestions. Thanks for your time!

Part of the Script Code:
Code:

expect {
   -re $prompt {   ;# Send individual commands and get user input
        set timeout -1
        
        # Get partner hostname and put in vipsetup.txt file
        send -s "hostname > vipsetup.txt\r"  
        expect -re $prompt
        
        # Display the network routing info for the user and prompt for 
        # network interface card number
        send -s "print \"The network routing table for the $ptner server is displayed below:\n\" ; netstat -rn \r"
        
        expect -re "\r(.*):\r"
        send -s "\nread n_card?'Enter the network interface card number for this server (i.e. eth0):   '\r"
        interact "\r" return    ;# Wait for user input from read command
        send -- "\r"
        send -s "echo \$n_card >> vipsetup.txt\r"  
        
        # Obtain subnet mask information for partner based on network 
        # interface card number being used
        send -s "msk=\$(cat /etc/sysconfig/network-scripts/ifcfg-\$n_card | grep NETMASK)\r"
        send -s "msk=\$(echo \${msk#NETMASK=})\r"
        send -s "echo \$msk >> vipsetup.txt\r"
    }
    timeout {
        send_user "Connection to host $hostip timed out."
        exit 6 
    }
    eof {
        send_user "Connection to host $hostip failed."
        exit
    }
}

Script Output:
Code:

The network routing table for the PRIMARY server is displayed below:
 
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
10.105.65.0     0.0.0.0         255.255.255.0   U         0 0          0 eth0
0.0.0.0         10.105.65.1     0.0.0.0         UG        0 0          0 eth0
 [root@remotehost root]$
[root@remotehost root]$ ber for this server (i.e. eth0):   '              < 
Enter the network interface card number for this server (i.e. eth0):   eth0

Dear all,

This is my current iptables (with default policy = Accept) and no rules.
Code:

[root@racnode1 ~]# iptables -L -v
Chain INPUT (policy ACCEPT 77072 packets, 7890K bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain OUTPUT (policy ACCEPT 70306 packets, 129M bytes)
 pkts bytes target     prot opt in     out     source               destination         
[root@racnode1 ~]#

I have decided to allow only incoming network connection from my own subnet and hence

Code:

[root@racnode1 ~]# iptables -A INPUT -s 192.168.0.0/24 -j ACCEPT
[root@racnode1 ~]# iptables -L -v
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
  178  9055 ACCEPT     all  --  any    any     192.168.0.0/24       anywhere            

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain OUTPUT (policy ACCEPT 186 packets, 316K bytes)
 pkts bytes target     prot opt in     out     source               destination         
[root@racnode1 ~]#

Noted that my default policy is still ACCEPT, hence I

Code:

[root@racnode1 ~]# iptables --policy INPUT DROP

===============================================================

Upon this, I have 2 issues

a) my iptables -L -v command can't display fully, i am stuck at below

Quote:
[root@racnode1 ~]# iptables -L -v
Chain INPUT (policy DROP 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
b) my ssh login is very slow

Quote:
login as: root
-- waited quite sometime before prompting me for password
===============================================================

If i removed revert the INPUT policy to ACCEPT, then everything will be fine as normal.

Why ?

Thanks and look forward to your advises.

Regards,
Noob ;(

Hi all,

I am trying to write a script that syncs files from source to destination. I have one centralized server that can ssh to any servers without pw. Now when I run the script, it can ssh to source server perfectly fine, but you need to enter password for destination server. Was wondering how I can clean this up before I start using case statements

Below is a sample I wrote

#!/bin/bash

#This scripts syncs shit

echo "Type in ID: "
read ID

echo "Type in Server : " #source server
read S

echo "Type in Destination Server: "
read DS

if [ $S == 9 ]; then
ssh -t "root@"$S"webserver1" "rsync -av /home/rlui/"$ID "root@"$DS"webserver2:/home/rlui/";
ssh -t "root@"$S"webserver1" "rsync -av /home/rlui/tmp/"$ID "root@sl"$DS"webserver2:/home/rlui/tmp/"
exit 1

where S and DS are cluster numbers

I apologize in advance if I am not clear on anything

Hello,

I have a flat file where I expect to have 5 values delimited by 4 commas ",' :
agf,sdya,geg,fgd,gdfgr

but sometimes I have the following:
agf,sdya,geg,fgd
agf,sdya,geg
agf,sdya
agf

For those lines, I wanna append commas at the end of the lines in order to always have a total of 4 commas:
agf,sdya,geg,fgd,
agf,sdya,geg,,
agf,sdya,,,
agf,,,,

The following awk command already gives me the count number of "," for each line:
awk -F\, '{print NF-1}' "MyFile"

But I am not sure where to go from there.
Basically I want to do the following;
If CommaCount For CurrentLine != 4 Then Append(4 - "number of commas found')CommasToLine
Else CheckNextLine.

Thanks for your help !

I have got a data file that contains 22 records.

When i write an awk script to compute the number of records, i print the value of NR variable. Why does it show 23 instead of 22?

I get the same output from FNR variable also. So what is the difference between NR and FNR variable?

In the text i found that
NR: gives number of records read- record number in the current file
FNR: file number of records read- a record number in the current file

Currently taking my first linux course in college and am stuck on a project...details he https://aacc.instructure.com/courses...item_id=614603

So far this is the code I have come up with but get an error on the 42nd line where it says done. I am not an expert by any means but would like to not struggle and finish this project. Below is my code...any input welcome.

#!/bin/bash
#blinker
#creates a bi-stable process that displays ON and OFF
touch .running
clear
while [ -f .running ]
do
count=0
while [ -f .running ]
do
count=$((count+1))
if [ $count -gt 4 ]
then
break
fi
echo "Green"
sleep 4
done
count=0
while [ -f .running ]
do
count=$((count+1))
if [ $count -gt 4 ]
then
break
fi
echo "red"
sleep 4
count=0
while [ -f .running ]
do
count=$((count+1))
if [ $count -gt 2 ]
then
break
fi
echo "green"
sleep 2
count=0
while [ -f .running ]
do
done
done

I'm a total total noob who is trying to download Linux Mint on a Mac OS X using a USB drive. I know there is some way to go into terminal and convert the iso file but I don't know how.

Here's the things I have tried so far: 1. sudo dd bs=4M if=[linuxmint-17.1-cinnamon-64bit.iso] of=/dev/disk2s1 (result: dd: bs: illegal numeric value)

~/path/to/Users/[my name]/linuxmint-17.1-cinnamon-64bit.img ~/path/to/Users/[my name]/linuxmint-17.1-cinnamon-64bit.iso -bash: /Users/[my name]/path/to/Users/[my name]/linuxmint-17.1-cinnamon-64bit.img (result: No such file or directory)
Maybe for #1 the "/dev/disk2s1" part is wrong? How do I find the number for the USB that goes after "dev/sd"? (I can only find "dev/disk2s1").

I have also tried to just mount/unmount the USB and drag the iso file into source/destination, to no avail.

Thanks so much!

gold finger was kind enough to share this with me a while ago:

Quote:
Do backups to either another HDD, partition, or a USB stick (if big enough to hold your data). Can use program to make an initial backup of /home/gregory; then use it to periodically update that backup by having it sync between your installed Xubuntu /home/gregory and the backup copy. The sync function will just copy over things that are new or changed, rather than copying everything all over again.

Assuming your Xubuntu filesystem is Ext4, example of doing initial backup would be something like this:

* Spare USB with large partition formatted as Ext4 and labeled "BACKUPS"
* Open luckybackup and choose "Backup" function
* "Source" = /home/gregory
* "Destination" = /media/gregory/BACKUPS (might be under /media/BACKUPS)
* Check box to not create new directories (it will just do exact copy of source)


After initial backup, either make a new task for syncing, or modify the backup task to turn it into a syncing task instead. Then use that periodically to update the backed-up /home/gregory.
I've downloaded Luckybackup and have been experimenting with it but I'm still not sure the best way to go about using it as a backup. Like in gold finger's advice, why would I check the box to not create new directories? It seems to me doing it without checking the box re-creates things just the way they are on my computer. When I check the box it just takes everything out of the folders. Seems confusing (and unnecessasry). And I have a really hard time finding the errors after a run and when I do find them I do I don't know what they mean. And so if I backup the source destination it makes an exact copy on my destination drive (with folders if I don't check the box, without if I do). Then if I do that as an ongoing thing, I will be backing up all my data with each run (which I'm assuming would be much more time consuming), whereas if I choose 'syncrhonize source and destination' it will only backup the changes in my source and usb drive (which would be my destination drive)?

Is that the idea?

And I noticed that Lucky did not want to transfer things with colons in them. Googling around somebody said that problem would be taken care of by switching to ext 3 or ext 4 for formatting the destination drive (as gold finger suggested). Is this a good idea? (I've always felt comfortabel with FAT because if I needed to plug my flash drive into Microsoft it would work (as well as with Linux).)

So the first time I use Lucky I choose "backup source inside destination" and of course the source and destination. Should I check the "Do NOT create extra directory" box? (Again, that seems off as 95% of what I'll be backing up is in folders.)

Then after I've done that, I choose the snyc option?

A lot of stuff. I know. Thanks.

PS. As a slight complication I have the data (basically the "home" folder) of my two computers (work and home) synced via Copy.com.

Is there a way to have a script called source, that can be run without the full path?

Ex:
When I run:
export PATH=/home/user:$PATH
source

I get:
Code:

$ source
bash: source: filename argument required
source: usage: source filename [arguments]

However I want it to run my script called source:
Code:

$ cat source 
#!/bin/bash
echo "Hello World"

Is there way to override a shell builtin in the PATH var or some other way?

Hi All,
We have some shell scripts which will send emails about backup, alerts etc using mail command. Example.
Code:

echo "Test Mail" | mail -s "Test" me@mydomain.com

I guess the above command just connect port number 25 of our mail server even if we do not define any port number. Now I would like add smtp port number as 587 in all of the bash scripts. I googled for this but could not get whatever I am expecting. So expecting your kind reply to define smtp port number as 587 in all of the bash scripts.

Thanks in advance.