itech9

From http://www.scottklarr.com/topic/134/linux-how-to-clear-the-cache-from-memory/

$ sync; echo 3 > /proc/sys/vm/drop_caches

Wait for caches to be flushed..

$ sync; echo 0 > /proc/sys/vm/drop_caches

From http://www.tech-recipes.com/rx/1419/list-files-in-an-rpm-package/

To list the contents of the RPM techrx.rpm use this command:

rpm -qlp techrx.rpm

From zulutips.com ..

for lx in `find . -type l`
do
  if [ ! -e $lx ]
  then
    echo $lx
  fi
done

NIS = Network Information Service, YP = Yellow Pages

1. Add domain to file /etc/sysconfig/network

NISDOMAIN=mydomain

2. Add IP to NIS server to /etc/yp.conf file

domain mydomain server 192.168.2.25

3. Start it

/etc/init.d/ypbind start

Use:

parted -l

or

fdisk -l

wget –recursive -x -l 0 -e robots=off –wait 1 \
-U Mozilla –no-parent –user=user –password=password \
https://hudson.dev.java.net/svn/hudson/trunk/hudson/plugins/ivy/

• – The DNS server is ‘named’
  – $ ps -ef | egrep named
  – $ /etc/init.d/named status
  – Config file is /etc/named.conf (see example below)
• – Configuration examples in /etc/named.conf file

  -- // Reverse DNS map
  zone "10.168.192.in-addr.arpa" {
          type master;
          file "/var/named/192.168.10.rev";
          };
  

  -- // Forward DNS map
  zone "mydomain.com" {
          type master;
          file "/var/named/mydomain.com.hosts";
          };
  

• – file “/var/named/mydomain.com.hosts”

  $ttl 38400
  @       IN      SOA     dns.mydomain.com. root (
                          2008081601
                          10800
                          3600
                          604800
                          38400 )
                  IN      NS      dns.mydomain.com.
                  IN      MX      10 dns.mydomain.com.
  dns             IN      A       192.168.10.2
  mach01          IN      A       192.168.10.50
  ;; .. other machines..
  machdbs01       IN      A       10.100.2.21
  ecnfs02         IN      CNAME   machdbs01
  ecnapp02        IN      CNAME   machdbs01
  ;; External machines
  machext01       IN      A       68.246.97.42
  ecnpart02       IN      A       68.246.97.43
  ....
  

scp  \
 user@machine:"/somepath/file1.txt \
/somepath/file2.doc \
/someotherpath/file3.c \
/somepath/file4.php \
/anypath/file5.bsh" \
.

Make sure there is (are) no space(s) after the back-slashes
and note the “.” (dot) at the end.. or replace the dot with
any target folder to copy the files to.

The /etc/sysconfig/network file contains the
HOSTNAME and the GATEWAY.

The /etc/sysconfig/network-scripts/ifcfg-eth0 file contains the
IPADDRess, NETMASK and BROADCAST addresses.

To backup:
– cd /etc/openldap
– slapcat -l backup.ldif

To reload:
– stop ldap (/etc/init.d/ldap stop)

– cd /var/lib/ldap

– mv world world0

– mkdir /var/lib/ldap/world

– chown ldap:ldap /var/lib/ldap/world

– /etc/init.d/ldap start

– cd /etc/openldap

– slapadd -l backup.blah

– chown -R ldap:ldap /var/lib/ldap/world