General Linux Notes
#grep "model name" /proc/cpuinfo model name : Intel(R) Xeon(TM) CPU 3.00GHzLinux Networking Notes
/etc/syconfig/networkGATEWAY=192.168.2.1
GATEWAYDEV=eth1
/etc/rc.d/init.d/network stop
/etc/rc.d/init.d/network start
/etc/rc.d/init.d/network restart
route -e
route add -host 123.213.221.231 eth1
route add default gw 192.168.1.254
route add -net 10.13.21.0 netmask 255.255.255.0 gw 192.168.10.254 eth0
route del -net 10.13.21.0 netmask 255.255.255.0 gw 192.168.10.254 eth0
ifconfig -a eth0 192.168.1.5 netmask 255.255.255.0
Routes are made permanent in Red Hat Linux by adding routes to /etc/sysconfig/static-routes
service network restart
/etc/resolv.conf
nameserver 66.28.0.45
find . -type f | xargs perl -pi -e 's/find/replace/g'
find . -name "*" -print | xargs grep search_key
find / -type f -size +20000k -exec ls -lh {} \; | awk '{ print $9 ": " $5 }'
NTP
[root@pype02 ~]# date
Wed Apr 11 08:22:29 PDT 2007
[root@pype02 ~]#
[root@pype02 etc]# service ntpd stop
[root@pype02 etc]# ntpdate -u 10.1.1.12
11 Apr 11:41:23 ntpdate[32042]: step time server 10.1.1.12 offset 892.821144 sec
[root@pype02 etc]# ntpdate -u 10.1.1.12
11 Apr 11:41:26 ntpdate[32043]: adjust time server 10.1.1.12 offset 0.000058 sec
[root@pype02 etc]#
[root@pype02 etc]# service ntpd start
ntpd: Synchronizing with time server: [ OK ]
Starting ntpd: [ OK ]
[root@pype02 etc]# ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
10.1.1.12 172.18.137.252 3 u 3 64 1 0.430 0.103 0.004
[root@pype02 etc]#
[root@pype02 etc]# date
Wed Apr 11 11:42:21 EDT 2007
[root@pype02 etc]#