Below is a portion of the Cisco config where pxeboot is defined for the dhcp pool net. You’ll notice 192.168.0.250 is defined as the next-server. Therefore you just need to make sure 192.168.0.250 is setup with tftp access and the proper pxelinux config is setup.
ip dhcp pool net import all network 192.168.0.0 255.255.255.0 bootfile pxelinux.0 next-server 192.168.0.250 dns-server 192.168.0.5 192.168.0.6 default-router 192.168.0.1 domain-name domain.com lease infinite
The script below was used to install and configure SNMP on a RHEL or CentOS box to act as a SNMP agent. This is a minimal configuration which can be tweaked for more functionality. In summary, the script does the following:
yum install net-snmp -y cp /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.orig <br />
cat > /etc/snmp/snmpd.conf << EOF rocommunity public com2sec local localhost public com2sec network_1 172.16.0.0/24 public com2sec network_2 192.168.0.0/24 public group MyROGroup_1 v1 local group MyROGroup_1 v1 network_1 group MyROGroup_2 v2c network_2 view all-mibs included .1 80 access MyROGroup_1 "" v1 noauth exact all-mibs none none access MyROGroup_2 "" v2c noauth exact all-mibs none none EOF chkconfig snmpd on service snmpd restart
The script below was used to configure the RHEL or CentOS host to act as an NTP client to the CentOS NTP pool. In summary, the script below does the following:
yum install ntp -y cp /etc/ntp.conf /etc/ntp.conf.orig <br />
cat > /etc/ntp.conf << EOF restrict default kod nomodify notrap nopeer noquery restrict -6 default kod nomodify notrap nopeer noquery restrict 127.0.0.1 restrict -6 ::1 server 0.centos.pool.ntp.org server 1.centos.pool.ntp.org server 2.centos.pool.ntp.org fudge 127.127.1.0 stratum 10 driftfile /var/lib/ntp/drift keys /etc/ntp/keys EOF chkconfig ntpd on service ntpd restart ntpq -p
The following is the script I use to install and configure DoveCot on RHEL of CentOS. In summary, the script is doing the following:
yum install dovecot -y cp /etc/dovecot.conf /etc/dovecot.conf.orig cat > /etc/dovecot.conf << EOF protocols = imap imaps protocol imap { } protocol lda { postmaster_address = postmaster@domain.com } auth default { mechanisms = plain passdb pam { } userdb passwd { } user = root } dict { } plugin { } EOF chkconfig dovecot on service dovecot restart
Once the script is completed, you can go ahead and use your mail client to connect to your server. The configuration file used here is for a IMAP(s) mail server.
Below is the script I use to install and configure Postfix. My configuration requires that I use a outbound relay host, a smtp server from Postini. In summary, this script will do the following:
yum install postfix -y cp /etc/postfix/main.cf /etc/postfix/main.cf.orig cat > /etc/postfix/main.cf << EOF myhostname = mail01.srv.domain.com myorigin = $myhostname mydestination = $myhostname, localhost.$mydomain, localhost mynetworks = 192.168.0.0/24 virtual_alias_domains = domain.com domain2.com virtual_alias_maps = hash:/etc/postfix/virtual relayhost = outboundsXXX.obsmtp.com # postini queue_directory = /var/spool/postfix command_directory = /usr/sbin daemon_directory = /usr/libexec/postfix mail_owner = postfix inet_interfaces = localhost, mail01 unknown_local_recipient_reject_code = 550 alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases sendmail_path = /usr/sbin/sendmail.postfix newaliases_path = /usr/bin/newaliases.postfix mailq_path = /usr/bin/mailq.postfix setgid_group = postdrop html_directory = no manpage_directory = /usr/share/man sample_directory = /usr/share/doc/postfix-2.3.3/samples readme_directory = /usr/share/doc/postfix-2.3.3/README_FILES EOF cp /etc/postfix/virtual /etc/postfix/virtual.orig cat > /etc/postfix/virtual << EOF # postmap /etc/postfix/virtual postmaster@domain.com user1 user1@domain.com user1 user.one@domain.com user1 @domain.com user1 postmaster@domain2.com user1 @domain2.com user1 EOF postmap /etc/postfix/virtual chkconfig --add postfix chkconfig postfix on chkconfig sendmail off service sendmail stop service postfix restart
To find out if your Apple hardware is covered under warranty. Visit Apple’s Online Service Assistant. Just plug in your serial number, select the country and Apple’s system will tell you if you’re covered.
https://selfsolve.apple.com/GetWarranty.do
Below are the contents of a script I use to install cacti on either RHEL or CentOS. In summary, the script does the following.
With that said, you can go ahead and login to Cacti and configure Cacti. If you need more help on Cacti, refer to documentation on Cacti’s website.
cd /tmp
# Setup rpmforge repo
rpm --import http://dag.wieers.com/rpm/packages/RPM-GPG-KEY.dag.txt
wget http://dag.wieers.com/rpm/packages/rpmforge-release/rpmforge-release-0.3.6-1.el5.rf.i386.rpm
rpm -ivh rpmforge-release-0.3.6-1.el5.rf.i386.rpm
yum update -y
# rrdtool 1.2.28 is broken - remove 1.2.28 and install 1.2.27
yum remove rrdtool -y
rpm -ivh ftp://rpmfind.net/linux/EPEL/5Client/i386/rrdtool-1.2.27-3.el5.i386.rpm
# install cacti et al
yum install cacti -y
yum install mysql-server -y
chkconfig mysqld on
chkconfig httpd on
service mysqld start
service httpd start
mysqladmin --user=root create cacti
cd /var/www/cacti
mysql cacti < cacti.sql
cat > /tmp/perm.sql << EOF
GRANT ALL ON cacti.* TO cactiuser@localhost IDENTIFIED BY 'cactiuser';
flush privileges;
exit
EOF
mysql mysql < /tmp/perm.sql
cat >> /var/spool/cron/root << EOF
*/5 * * * * cacti php /var/www/cacti/poller.php > /dev/null 2>&1
EOF
cat > /etc/httpd/conf.d/cacti.conf << EOF
Alias /cacti/ /var/www/cacti/
DirectoryIndex index.php
Options -Indexes
AllowOverride all
order deny,allow
deny from all
#allow from 127.0.0.1
allow from all
AddType application/x-httpd-php .php
php_flag magic_quotes_gpc on
php_flag track_vars on
EOF
service httpd restart
echo "Login to the server via browser at http://`hostname`/cacti/index.php"
echo "login and password is admin"
The following are examples of the different configuration you can use to connect to an Oracle database. With Load Balancing:
sales.us.acme.com= (DESCRIPTION= (ADDRESS_LIST= (LOAD_BALANCE=on) (ADDRESS=(PROTOCOL=tcp)(HOST=sales1-server)(PORT=1521)) (ADDRESS=(PROTOCOL=tcp)(HOST=sales2-server)(PORT=1521))) (CONNECT_DATA= (SERVICE_NAME=sales.us.acme.com)))
With Connect-Time Failover:
sales.us.acme.com= (DESCRIPTION= (ADDRESS_LIST= (LOAD_BALANCE=off) (FAILOVER=ON) (ADDRESS=(PROTOCOL=tcp)(HOST=sales1-server)(PORT=1521)) (ADDRESS=(PROTOCOL=tcp)(HOST=sales2-server)(PORT=1521))) (CONNECT_DATA=(SERVICE_NAME=sales.us.acme.com)))
With Advanced Connect Data Parameters (SERVICE_NAME defines a service called sales.us.acme.com):
sales.us.acme.com= (DESCRIPTION= (ADDRESS=(PROTOCOL=tcp)(HOST=sales-server)(PORT=1521)) (CONNECT_DATA= (SERVICE_NAME=sales.us.acme.com)))
Create a 500g volume with space guaranteed for the volume.
vol create new_vol -s volume aggr0 500gResize the volume if needed
vol size new_vol 600g
Offline and destroy volume if a mistake was made
vol offline new_vol vol destroy new_vol
Create the qtree
qtree create /vol/new_vol/new_qtree
Create the 50g LUNs for Solaris
lun create -s 50g -t solaris /vol/new_vol/new_qtree/new101_lun lun create -s 50g -t solaris /vol/new_vol/new_qtree/new102_lun lun create -s 50g -t solaris /vol/new_vol/new_qtree/new103_lun lun create -s 50g -t solaris /vol/new_vol/new_qtree/new104_lun
Map the LUNs
lun map /vol/new_vol/new_qtree/new101_lun SYSTEM01 101 lun map /vol/new_vol/new_qtree/new102_lun SYSTEM01 102 lun map /vol/new_vol/new_qtree/new103_lun SYSTEM01 103 lun map /vol/new_vol/new_qtree/new103_lun SYSTEM01 104
vtoc
cat > /tmp/vtoc50g << EOF VTOC INFO EOF
Label disks and apply layout
fmthard -s /tmp/vtoc50g /dev/rdsk/c10t600xxxxxxd101s2 fmthard -s /tmp/vtoc50g /dev/rdsk/c10t600xxxxxxd102s2 fmthard -s /tmp/vtoc50g /dev/rdsk/c10t600xxxxxxd103s2 fmthard -s /tmp/vtoc50g /dev/rdsk/c10t600xxxxxxd104s2
Update permissions
chown oracle:dba /dev/rdsk/c10t600*d10* chown oracle:dba /dev/dsk/c10t600*d10*
The DBA can now go ahead with adding the disks underl ASM control.