The /etc/hosts and /etc/resolv.conf file for Bind server on CentOS 7

/etc/hosts file should contain

127.0.0.1 localhost server1
192.168.28.150 server1.sourav.com server1

/etc/resolv.conf should contain

search sourav.com
nameserver 127.0.0.1


My Network Configuration file looks like this

TYPE="Ethernet"
BOOTPROTO="static"
DEFROUTE="yes"
IPV4_FAILURE_FATAL="yes"
IPV6INIT="no"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_PEERDNS="yes"
IPV6_PEERROUTES="yes"
IPV6_FAILURE_FATAL="no"
NAME="ens33"
UUID="9a7aed2a-76a6-48c7-a320-f581c760e8d4"
ONBOOT="yes"
IPADDR0="192.168.28.150"
PREFIX0="24"
GATEWAY0="192.168.28.2"
DNS1="127.0.0.1"
HWADDR="00:0C:29:5D:DD:7D"

Vsftpd with SSL-TLS on CentOS 7

after installing vsftpd you have to perform
setsebool -P ftp_home_dir=1

sudo mkdir /etc/ssl/private

To create the certificate and the key in a single file, we can use this command:

openssl req -x509 -nodes -days 365 -newkey rsa:1024 -keyout /etc/ssl/private/vsftpd.pem -out /etc/ssl/private/vsftpd.pem

go to /etc/vsftpd/vsftpd.conf
comment the line
anonymous_enable=YES
uncomment the line
chroot_local_user=YES
add the line

dual_log_enable=YES
At the end add those lines
rsa_cert_file=/etc/ssl/private/vsftpd.pem
rsa_private_key_file=/etc/ssl/private/vsftpd.pem
ssl_enable=YES
allow_anon_ssl=NO
force_local_data_ssl=YES
force_local_logins_ssl=YES
ssl_tlsv1=YES
ssl_sslv2=NO
ssl_sslv3=NO
require_ssl_reuse=NO
ssl_ciphers=HIGH
save the file
firewall-cmd --permanent --add-port=21/tcp
firewall-cmd --permanent --add-port=21/udp
firewall-cmd --permanent --add-port=20/tcp
firewall-cmd --permanent --add-port=20/udp
firewall-cmd --permanent --add-service=ftp
firewall-cmd --reload
service vsftpd restart
chkconfig vsftpd on

Set IP to Windows 7 from command line

 netsh interface ip set address "connection name" static 192.168.0.101 255.255.255.0 192.168.0.1


NOTE: The default connection names are Local Area Connection for wired adapters and Wireless Network Connection for Wi-Fi adapters. The IP address order: client IP, subnet mask, and gateway IP.


Here’s how to configure the DNS addresses:


netsh interface ip add dns "connection name" 208.67.222.222


netsh interface ip add dns "connection name" 208.67.220.220 index=2


NOTE: Remember to replace the connection names and IP addresses.


 To dump the TCP/IP configuration:

    netsh -c interface dump > PATH_AND_FILENAME.txt


To import the TCP/IP configuration:

    netsh -f PATH_AND_FILENAME.txt
For setting dhcp



netsh interface ip set address "Local Area Connection" dhcp

Delete IOS from Flash, boot from new IOS ,TFTP

sh flash

delete flash

confirm y


reload


rommon 1> IP_ADDRESS=x.x.x.x
rommon 2> IP_SUBNET_MASK=x.x.x.x
rommon 3> DEFAULT_GATEWAY=x.x.x.x
rommon 4> TFTP_SERVER=x.x.x.x
rommon 5> TFTP_FILE=1841-i-mz.bin

type 
tftpdnld

and press enter

if everything right the ios will be copied to flash

then 

reset

and you are done

Pen Drive mounted as read only error

Recently I have come across this error in Ubuntu

using mount command find the mounted location

and then

mount -o remount,rw /mount/point