Clear Screen After Every Netstat Update

Hi there!

After my NVIDIA card died I decided it was time to buy an AMD card again (R9 270X), but I didn't think AMD drivers were such a pain in Linux as people said. Of course, in some distros anyway. On Arch, for example, there's no official release because Arch's developers would have to hold Xorg in order to make a closed-source driver available, because AMD's pace isn't in pair with Linux. So in order to install AMD's drivers on Arch I must rely on some guy's unnoficial repositories, but that isn't the whole problem. Even though I'm cool with adding repos and downgrading Xorg, I'm not cool with it not working for a lot of apps, so that's where I decided to try a few distros. Manjaro is a no-go because it installs Flash as default. openSUSE although is a very good distro, is a complete mess when it comes to repositories, specially multimedia ones. Ubuntu/Mint are also a no-go, Ubuntu because after 12.04 they have a spyware by default, and Mint because it contains non-free stuff by default.

So here I come! I ran Debian in the past for a long time (aside from a breaf period last year) and it was lovely, I could easily set up a custom encrypted install, but now I don't remember how to, and it's killing me. I don't like how the installer doesn't show the partitions size as they actually are, and I don't like how the automated encrypted LVM setup doesn't let me chose the encryption algorithm or the timeframe between each passphrase attempt. That's why I must create my install, and here's what I used to do on Arch (the part that really matters), converted to what I use on Debian:

Code:

# modprobe dm-mod

(create one 1GB partition for /boot, unencrypted ; create another big 930 GB formatted as "8e" - LVM - on dev/sda2)
Code:

# fdisk /dev/sda

(chose my ciphers and iter time)
Code:

# cryptsetup -c twofish-xts-plain64 -y-s 512 --iter-time 5000 luksFormat /dev/sda2

(open the luks container on "sda2_crypt")
Code:

# cryptsetup open --type luks /dev/sda2 sda2_crypt

(create physical volume on sda2_crypt)
Code:

# pvcreate /dev/mapper/sda2_crypt

(create volume group "debian" on sda2_crypt)
Code:

# vgcreate debian /dev/mapper/sda2_crypt

(create volumes)
Code:

# lvcreate -L 8G system -n root
# lvcreate -L 60G system -n swap
# lvcreate -l 100%FREE system -n home

After this is done, I go to the "partition disks" page where I select each partition/volume to it's correct destination. I then procceed to installing the base system, configuring apt, and all that. Now, before I install Grub I used to execute the following commands on shell:

Code:

 # nano /etc/crypttab

I used to put something there, but I don't remember what exactly. It's been a long time since I used Debian for long! But here's what I put the

Code:

sda2_crypt /dev/mapper/sda2_crypt none luks

Then I procceeded to instal syslinux (I REALLY don't like GRUB)

Code:

# chroot /target
# apt-get install syslinux

But I get the following error:

Quote:
E: cannot write log (Is /dev/pts mounted?) - posix_openpt (2: No such file or directory).
I'm assuming this is just a non-critical error. But this is not the problem, the problem is when I try to install syslinux:

Code:

# syslinux-install_update -i -a -m

The output:

Quote:
/bin/sh: 2: syslinux-install_update: not found
Then I type "syslinux --help":

Code:

# syslinux -h

Quote:
Usage: syslinux [options] device
--offset -t Offset of the file system on the device
--directory -d Directory for the installation target
--install -i Install over the corrent bootsector
--update -U Update a previous installation
--zip -z Force zipdrive geometry (-H 64 -S 32)
--sectors=# -S Force the number of sectors per track
--heads=# -H Force number of heads
--stupid -s Slow, safe and stupid mode
--raid -r Fall back to the next device on boot failure
--once=... Execute a command once upon boot
--clear-once -O Clear the boot-once command
--reset-adv Reset auxilliary data
--menu-save= -M Set the label to select as default on next boot
--force -f Ignore precautions
I tried literaly every possible combination that would make sense in Arch and yet I can't install it. The Debian documentation on syslinux doesn't help at all, and the Arch's Wiki on Syslinux... well, tells how to make it work on Arch It used to work the same way on Debian, but now it doesn't.

Here's a little list of the errors I get:

Code:

# syslinux -i -U

Quote:
Usage: syslinux [options] device
--offset -t Offset of the file system on the device
--directory -d Directory for the installation target
--install -i Install over the corrent bootsector
--update -U Update a previous installation
--zip -z Force zipdrive geometry (-H 64 -S 32)
--sectors=# -S Force the number of sectors per track
--heads=# -H Force number of heads
--stupid -s Slow, safe and stupid mode
--raid -r Fall back to the next device on boot failure
--once=... Execute a command once upon boot
--clear-once -O Clear the boot-once command
--reset-adv Reset auxilliary data
--menu-save= -M Set the label to select as default on next boot
--force -f Ignore precautions
Code:

#syslinux --install --update

Quote:
Usage: syslinux [options] device
--offset -t Offset of the file system on the device
--directory -d Directory for the installation target
--install -i Install over the corrent bootsector
--update -U Update a previous installation
--zip -z Force zipdrive geometry (-H 64 -S 32)
--sectors=# -S Force the number of sectors per track
--heads=# -H Force number of heads
--stupid -s Slow, safe and stupid mode
--raid -r Fall back to the next device on boot failure
--once=... Execute a command once upon boot
--clear-once -O Clear the boot-once command
--reset-adv Reset auxilliary data
--menu-save= -M Set the label to select as default on next boot
--force -f Ignore precautions
Code:

# syslinux --install --update -i -a -m

Quote:
Usage: syslinux [options] device
--offset -t Offset of the file system on the device
--directory -d Directory for the installation target
--install -i Install over the corrent bootsector
--update -U Update a previous installation
--zip -z Force zipdrive geometry (-H 64 -S 32)
--sectors=# -S Force the number of sectors per track
--heads=# -H Force number of heads
--stupid -s Slow, safe and stupid mode
--raid -r Fall back to the next device on boot failure
--once=... Execute a command once upon boot
--clear-once -O Clear the boot-once command
--reset-adv Reset auxilliary data
--menu-save= -M Set the label to select as default on next boot
--force -f Ignore precautions
Oh, and also users are still not able to press TAB to get the full command without typing it? And we can't even press the up arrow key that we get "^[[A"? :P Whaat?

What am I doing wrong?

I'm really not with the time to mess with these kinds of things, so either I figure this out REAL SOON or I'll be forced to get back to Windows

Hello,

I try to use a ftp daemon and a Telnet daemon with inetd and the BusyBox v1.19.0 on a linux 2.6.24.

When running inetd and then checking what is listening with "netstat -an |grep LISTEN" i have :
Code:

netstat: /proc/net/tcp6: No such file or directory
netstat: /proc/net/udp6: No such file or directory
netstat: /proc/net/raw6: No such file or directory
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN

tcp        0      0 0.0.0.0:21              0.0.0.0:*               LISTEN

tcp        0      0 0.0.0.0:23              0.0.0.0:*               LISTEN

ftp port 21 and Telnet port 23 seems to be listening.

My inetd.conf file is :

Code:

#<service_name>    <sock_type>    <proto>    <flags> <user>     <server_path>     <args> 

21 stream tcp nowait root ftpd ftpd /etc
telnet            stream        tcp        nowait    root    /usr/sbin/telnetd

I have no rule in my hosts.deny so nothing should be stopped and i have no iptables firewall in place too.

When typing "ftp://ipofthetarget" in a web browser i have a error :

Code:

504 Gateway Timeout
Gateway timeout expired while waiting for server response.

And when trying to Telnet from another computer or "Telnet localhost" from the board i have :
Code:

# telnet 10.2.29.201
Trying 10.2.29.201...
connected to 10.2.29.201.
Escape character is '^]'

Connection closed by foreign host.

This would mean that the connection for Telnet exist but why is it closing ?

Thank you for your future answers !

UPDATE 1 :
If i try to run telnetd like this :
/usb/sbin/telnet -l /bin/sh
i can connect anonymously from another computer, not perfect because i would like a user/password but still of use.
The problem with the ftp daemon still exist.

UPDATE 2 :
Trying from Windows cmd or linux terminal : ftp ipofthetarget seems to work
Not perfect because i would like a user/password too but still of use.

I am still open for suggestion for the user/password thing. I am not deleting the thread in case someone interested about this exist.

I want to And search grep shell

but It's hard to grep variable


---------------------------------------------------------------
#!/bin/bash


if [ $# -eq 0 ]
then
echo "Ussage: phone searchfor [...searchfor]"
echo "(You didn't tell me what you want to search for )"

else

pass=0
find=""

for idx in $*
do
if [ -n "$idx" ]
then
if [ $pass -eq 0 ]
then
find=$(egrep "$idx" mydata)
pass=1

else

find=$("$find" | grep "$idx")

echo $find
fi
fi

done

if [ -z "$find" ]
then
echo "There is no such thing"
else

echo $find | awk -f display.awk

fi

fi

-----------------------------------------------------

there is one error : command not found

in find=$("$find" | grep "$idx")

how can I grep variable and store it into variable?

Hi all,

can someone please explain to me these three line?

filename=`basename $0`

if [[ $# = 1 ]] ; then
LocalHost=$1



what I am not clear is the O and 1.

thanks,

Hi all

I am helping fixing a set of old suse VMs and there is something seriously weird going with the networking.

My netstat -nr shows one set of routing commands and the yast/networking shows another set routes, routes that I know doesn't exist on our network.

Has anyone seen this before?

For example, in the attached screenshot, we can see yast shows I have no routes.
But here is the netstat -nr output:

hostname:~ # route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.224.0 * 255.255.255.0 U 0 0 0 eth10
192.168.226.0 * 255.255.255.0 U 0 0 0 eth11
192.168.110.0 * 255.255.254.0 U 0 0 0 eth12
link-local * 255.255.0.0 U 0 0 0 eth10
loopback * 255.0.0.0 U 0 0 0 lo
default 192.168.110.1 0.0.0.0 UG 0 0 0 eth12

Thanks

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

In my Ubuntu 14.04 something happened to gnuplot app. When I invoke a command gnuplot filename.gnu no canvas is generated. I think it began about a month ago but at that time I worked on this machine via a remote desktop and I thought, mistakenly, that the plot actually was generated on the major machine and I could not see it. I operated at that time via a laptop. So, today is the first day I am testing this software on my desktop and lo and behold no plot is generated.

When command is run Ubuntu does not come to the command prompt. It gets suspended and waits. If I click RETURN button, the command prompt will again appear but where is the plot?

I hope I made my plight clear.

Needles to say I have used gnuplot many times in the past although perhaps in Ubunutu VM which I will test shortly.

I also made sure that gnuplot is installed, trying to do

Quote:
sudo apt-get install gnuplot
The result was that I do have it installed.

What is the problem?

Thanks, - A.

So, I'm new here. Was thrown into the deepend (read: shallow pool) of linux administration of a few centos 6.5 servers in October, and I've been pretty slow on the uptake. Years of Windows administration and desktop support will do that I guess.

So we have qmail on our prod servers that send out messages for our webapps. Postfix failed last night on a prod server, and it occurred to me that it's happened a few times since I've started, and instead of waiting for clients to tell us, I should be more proactive. I came up with/begged/borrowed/stole a quick script to check to see if postscript was running, and if it was, restart it, and contact us. This was to be run from jenkins.

Quote:
if (( $(ps -ef | grep -v grep | grep postfix | wc -l) > 0 ))
then echo 'Mail is up.'
else echo 'Mail is down! Attempting to restart service...'
service postfix restart
fi
The question was then raised about an unresponsive process (zombies!), and I figured it might be a better idea to use postqueue -q, or mailq to either see a Mailbox is empty, or look for fatal if postfix is off or unresponsive. This is where I ran out of coffee and went over the deep end.

To get this to work, I thought it would be a good idea to run two scripts. One to check if the mail queue is empty, and if not, send up a flag. The next was to run a few minutes later to check and see if the mail queue was throwing up a fatal error, and if it was, throw up a second flag, which sent out an email from jenkins. Incidentally, if the mailqueue were clogged, this would also trigger an alert. Our mailqueue doesn't get a lot of traffic.

First command. Returns then and else statement without issue.
Quote:
if ((mailq | grep 'empty') < 0 ); then echo 'Mail is up.'; else echo 'Mail queue is not empty. Please check mail server'; fi
Second one... Not so much.
Quote:
if (mailq | grep 'fatal') < 1; then echo 'Mail is up.'; else echo 'Mail queue is not empty. Please check mail server'; fi
You can probably suss out what I'm trying to do here, even though I'm not doing it right. Any ideas? I know this is newbie stuff, and I appreciate your taking the time to read this people.

Hello there. Im stuck on a task.

it`s the task:
Search the file 'data' for all of the lines that contain the pattern 'linux'
and put those lines in the file 'matches'.

You entered: grep "linux" date > matches
Please try again.

I tried lots of variants
1) grep linux date > matches
2) grep 'linux' date > matches
3) grep linux date >> matches

May be something`s wrong with grep command?
I just dont get it >.>; it should work fine. Where is my mistake folks?

I have made a change to GRUB2 bootloader in etc/default/grub.
Now I need to run 'update grub' for the change to take effect.
However, the 'update grub' command on the terminal is giving this error message:
Code:

root@debian:/# update grub
bash: update: command not found

Can someone please explain why this command is no longer working?

I've had to make a change to grub because I tried to install a new distro which meant I had to alter grub.
The install wasn't successful so I deleted the grub file and then re-installed it.
The re-installed grub needs a change so I can get sound on my pc.
However, I can't add these changes because the 'update grub' command doesn't work.

I've checked the grub file with another debian distro and they are both the same.
So now I don't know if I need to check if a different grub file is the problem or anything else.
Can someone help?