About bentech4u


Network Issue on VMWare Workstation – CentOS 7 & above

I was facing this issue with centos 7.2 release and device was not showing in my nmcli.

I tried many times adding/removing cards the reason is that the v7 3.10 kernel no longer supports the Ethernet Controller device And the solution is..

I added the following line to your  .vmx file and reboot system.

ethernet0.virtualDev = “e1000”

*replace ethernet0 with your card specific number

Script to Detect un-used/not mounted Storages

simple script to alert unused storage space. This will also tell you active storage path mount points

#created by Ben.T.George
LunId=( `luxadm probe |grep -v “Type:Tape” |grep -v “Node WWN:” | awk -F\/ ‘NR>3{print $4}’|sed ‘s/..$//g’` )
zonelist=( `zoneadm list` )
echo “__________________________________________________________________________________”
zoneadm list -cv
echo “__________________________________________________________________________________”
for luns in “${!LunId[@]}”;do
(echo -e “\x1B[31m ${LunId[$luns]} \x1B[0m”
echo “”
result=$(echo | format “${LunId[$luns]}” 2>&1 |egrep -c ‘(mounted|zpool)’)
if [ $result -gt 0 ]; then
echo -e “\x1B[01;96m ${LunId[$luns]} mounted on: $(mount | grep ${LunId[$luns]} | awk ‘{print $1}’)\x1B[0m”
echo -e “\x1B[01;31m ${LunId[$luns]} not mounted \x1B[0m”

One Line Script to list all LUNS on Solaris 10

Hi All,


Here is one line script to list all LUN’s(only external Storage) on solaris 10.


root@benvin.net# luxadm probe | grep -v “Node WWN:” | awk -F\/ ‘NR>3{print $4}’|sed ‘s/..$//g’

Good luck

Copy RSA keys to all Solaris zones & restart ssh service

This is a simple script to copy SSH RSA keys to all standard zones and restarting ssh services on all .

i am not going to explain how to create public RSA keys. Also assume that RSA key is copied to global zone.

usage : create file with script, give exicute permission & run example.sh <ip>

IFS=$’\n’ read -d ” -ra name < <(ssh “$ipaddress” zoneadm list -cv | awk ‘NR > 2{print $4}’ )
IFS=$’\n’ read -d ” -ra state < <(ssh “$ipaddress” zoneadm list | awk ‘NR > 1’ )

for i in “${!name[@]}”;do
ssh $ipaddress mkdir -p “${name[$i]}”/root/.ssh
ssh $ipaddress chmod 700 “${name[$i]}”/root/.ssh
echo “copying RSA keys on : ${state[$i]}”
echo “ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA4T+N21GzKnYgCh9sC72qhOYKjbjHRyp5GqWPDGSfUkhmk8iJRAS2hhcP5lZ1x6fc/cNzqETQ98sjdKm59PB7MSJQ12WMHTc7wtuBdh7+wE0ZlWsjGfEvzCaWIXNUhh2hK2ZUq7XMZ5QR2E+j2uWTJKsZmQyf4
A5z8nLTAtL2CKQamxZskABttpXkxx7gm+yc8coJB8nhOr6Q4KsyDcEmjGAFwbjiBKyefUIiMroP0PtZPI/8EYtwtP/Cm79BFzhJtOl/VGqTvlab+1IQeO54/ztL0gg7C0zTwNTKODTrCNh+nIj6Fk6/CjyX0Qg9xWd7BRr1oUbI5yMvg3wLD66tEw== root@kwtprgateone01
” | ssh $ipaddress “cat >> “${name[$i]}”/root/.ssh/authorized_keys”
ssh $ipaddress chmod 600 “${name[$i]}”/root/.ssh/authorized_keys
echo “changing ssh configuration files on: ${state[$i]}”
ssh $ipaddress “cat ${name[$i]}/root/etc/ssh/sshd_config | sed ‘s/PermitRootLogin no/PermitRootLogin yes/g’ > ${name[$i]}/root/tmp/sshd_config ; cp ${name[$i]}/root/tmp/sshd_config ${name[$i]}/root/e
echo “Restarting ssh service on : ${state[$i]}”
ssh $ipaddress “zlogin ${state[$i]} svcadm restart ssh”

Solaris disk utilization(including zones) script & sending to mysql


I have been writing scripts to automate my solaris admin tasks. currently i am handling more than 250 sun servers and my primary focus area is solaris nowadays. Somehow linux came to 2nd priority

today i am posting some script to monitor disk utilization of solaris server including zones(containers). And this script will send result to mysql database directly .you need to run this script on global zone and you than set the disk check threshold value also.

To connect to mysql, you need to install mysql-client package. ie simple compile & make. you can download mysql-client from http://dev.mysql.com/downloads/mysql/5.1.html. For compiling this package , you need Compilers and other development tools. You can get all this from sun studio. Install sun studio and include studio in your PATH.


#Created By – Ben George – ben@benvin.net
IFS=$’\n’ read -d ” -ra filesystem < <(df -h | egrep -e ‘/dev/dsk|pool’)
IFS=$’\n’ read -d ” -ra zonename < <(zoneadm list)
DATE=$(/usr/bin/date |awk ‘{print $3″-“$2”-“$6}’)
ipaddress=$(ifconfig -a | grep inet | grep -v ‘’ | awk ‘NR>1{ print $2}’| head -1)
for i in “${!zonename[@]}”;do

if [ “${zonename[$i]}” = “global” ];then
for i in “${!filesystem[@]}”;do
percentage=$(echo “${filesystem[$i]}” | awk ‘{print $5}’ | sed ‘s/%/ /g’)
if [ $percentage -gt 50 ];then
mountpoint=$(echo “${filesystem[$i]}” | awk ‘{print $6}’)
echo $HOSTNAME $ipaddress $mountpoint “:” $percentage”%”
/opt/mysql/bin/mysql –host= –user=root –password=Redhat server_daily << EOF
insert into filesystem (hostname,ipaddress,time,filesystem_name,percentage) values(‘$HOSTNAME’,’$ipaddress’,’$DATE’,’$mountpoint’,’$percentage’);
echo “${zonename[$i]}”
IFS=$’\n’ read -d ” -ra zonefilesystem < <(zonecfg -z “${zonename[$i]}” info | egrep ‘pool|dir:’ | awk ‘{print $2}’)
for j in “${!zonefilesystem[@]}”;do
echo “${zonefilesystem[$j]}” | while read n;do
zonepercentage=$(zlogin “${zonename[$i]}” df -h “${zonefilesystem[$j]}” | awk ‘NR>1{print $5}’ | sed ‘s/%/ /g’)
if [ $zonepercentage -gt 50 ];then
zone_mountpoint=$(zlogin “${zonename[$i]}” df -h “${zonefilesystem[$j]}” | awk ‘NR>1{print $6}’)
zone_hostname=$(zlogin “${zonename[$i]}” hostname)
zone_ip=$(zlogin “${zonename[$i]}” ifconfig -a | grep inet | grep -v ‘’ | awk ‘{ print $2}’)
echo $zone_hostname $zone_ip $zone_mountpoint “:” $zonepercentage”%”
/opt/mysql/bin/mysql –host= –user=root –password=Redhat server_daily << EOF
insert into filesystem (hostname,ipaddress,time,filesystem_name,percentage) values(‘$zone_hostname’,’$zone_ip’,’$DATE’,’$zone_mountpoint’,’$zonepercentage’);


How to audit solaris commands like rm,mv,cron,zip… as realtime


we faced one issue in production solaris machine like someone/some program is deleting one directory sometimes. I decided to explore more on this and finally found Dtrace , that comes with solaris bundle



DTrace is a comprehensive dynamic tracing framework created by Sun Microsystems for troubleshooting kerneland application problems on production systems in real time. Originally developed for Solaris, it has since been released under the free Common Development and Distribution License (CDDL) and has been ported to several other Unix-like systems.


DTrace can be used to get a global overview of a running system, such as the amount of memory, CPU time, filesystem and network resources used by the active processes. It can also provide much more fine-grained information, such as a log of the arguments with which a specific function is being called, or a list of the processes accessing a specific file.


Here i am showing some simple script to trace the commands and send output to file. After that we can logrotate that based on size bcoz this will dump huge lines of putput


create a file with below script and start that script with nohup, that’s it



dtrace -qn ‘syscall::unlink*:entry { printf(“%d, %s, %Y, %s\n”, uid, execname, walltimestamp, copyinstr(arg0));}syscall::fsat:entry  /arg0 == 5 / { printf(“%d, %s, %Y ,%s\n”, uid, execname, walltime

stamp, copyinstr(arg2));}’ | tee -a /var/tmp/spora.log



How to install PAC Manager On Fedora

PAC is a Perl/GTK replacement for SecureCRT/Putty/etc (linux ssh/telnet/… gui)… It provides a GUI to configure connections: users, passwords, EXPECT regular expressions, macros, etc.


  • Unique linux app to implement SecureCRT’s functionality (more or less!)
  • Remote and local macros
  • Remotely send commands with EXPECT regexp
  • Cluster connections!! Connections on same cluster share keystrokes!!
  • Scripting support! (vía Perl code)
  • Serial/tty connection via cu/tip/remote-tty connections!!
  • Pre/post connections local executions
  • TABS OR WINDOWS for connections!!
  • Proxy support
  • KeePass integration!
  • Wake On LAN capabilities
  • Possibility to split terminals in the same TAB!
  • Quick acces to configured connections via tray menu icon
  • Best linux GUI for ssh, telnet, sftp, rdesktop, vnc, cu, remote-tty, ftp, etc
  • DEB, RPM & .TAR.GZ packages available!!
  • More to come (ASA I find time!)
  • FREE (GNU GPLv3)

Download package from : http://sourceforge.net/projects/pacmanager/files/pac-4.0/


Install Dependency packages by using yum


# sudo yum install perl-YAML uuid-perl perl-Gtk2-GladeXML perl-Crypt-CBC perl-Socket6 perl-Net-ARP perl-Gtk2-Ex-Simple-List perl-Crypt-Blowfish perl-Net-SSH-Expect perl-IO-Stty vte tigervnc rdesktop

UPDATE: When you face issue with PAC manager Opening, please follow below steps.

First of all, install (yum or whatever method you prefer) the “Vte development” package (it’s very small, so don’t worry).
In Debian, is called ‘libvte-dev’, but in RedHat (and derivatives) I think it’s named ‘vte-devel’. So, something like:

yum install vte-devel

should work.


# wget http://search.cpan.org/CPAN/authors/id/X/XA/XAOC/Gnome2-Vte-0.11.tar.gz
# tar xfz Gnome2-Vte-0.11.tar.gz
# cd Gnome2-Vte-0.11/
# perl Makefile.PL make

At this point, please, modify your ‘/opt/pac/lib/ex/vte64/auto/Gnome2/Vte/Vte.so’ with the newly complied one ‘blib/arch/auto/Gnome2/Vte/Vte.so’. So, do:

sudo cp -f blib/arch/auto/Gnome2/Vte/Vte.so /opt/pac/lib/ex/vte64/auto/Gnome2/Vte/