User contributions for Saurabh
From Notes_Wiki
- 12:51, 9 November 2012 diff hist +1,772 N Rate limiting using iptables Created page with "=Rate limiting using iptables= We can limit rate of network communication using iptables to protect against flood attacks and also to regulate network usage. ==To protect a..."
- 12:51, 9 November 2012 diff hist +2,984 N Limiting number of new connections Created page with "=Limiting number of new connections per interval using iptables= We can also limit number of new connection attempts per interval using iptables. This is required even though..."
- 12:50, 9 November 2012 diff hist +619 N Limiting number of simultaneous connections Created page with "=Limiting number of simultaneous connections using iptables= ==Using connlimit module== We can use connlimit module of iptables to limit number of simultaneous connections t..."
- 12:50, 9 November 2012 diff hist +191 N Iptables configuration Created page with "=iptables configuration= *Limiting number of simultaneous connections *Limiting number of new connections *Rate limiting using iptables *NAT using iptables *[..."
- 12:50, 9 November 2012 diff hist +29 m Main Page
- 12:49, 9 November 2012 diff hist +1,521 N Configuring HP D1668 Deskjet in CentOS Created page with "=Configuring HP D1668 Deskjet in CentOS 5.4= (Required SELinux to be disabled, at least during installation) *Run '<tt>yum -y -d 10 -e 1 install cups cups-devel gcc-c++ ghos..."
- 12:48, 9 November 2012 diff hist +62 N Printer drivers Created page with "=Printer drivers= *Configuring HP D1668 Deskjet in CentOS"
- 12:48, 9 November 2012 diff hist +70 N Hardware drivers configuration or installation Created page with "=Hardware drivers configuration or installation= *Printer drivers"
- 12:48, 9 November 2012 diff hist +52 m Main Page
- 12:47, 9 November 2012 diff hist +1,230 N Configuring wireless interfaces Created page with "=Configuring wireless interfaces= To configure wireless interfaces in Linux one can use combination of '<tt>ifconfig</tt>', '<tt>iwconfig</tt>' and '<tt>iwlist</tt>' commands..."
- 12:45, 9 November 2012 diff hist +791 N IPv4 route configuration Created page with "=IPv4 route configuration= To add routes whenever a network gets started automatically we need to create a per-interface route file. For examples if we can reach network '10...."
- 12:45, 9 November 2012 diff hist +1,567 N MAC spoofing on Virtual machines Created page with "=MAC spoofing on virtual machines= We can change MAC address of interface using: <pre> ifconfig eth0 down ifconfig eth0 hw ether <new_MAC> ifconfig eth0 up </pre> But on Vir..."
- 12:44, 9 November 2012 diff hist +2,375 N Enabling wake on lan (WoL) Created page with "=Enabling Wake on LAN (WoL)= To enable wake on lan for a interface when it receives magic packet: *Open file '<tt>/etc/sysconfig/network-scripts/ifcfg-eth<n></tt>' *Add..."
- 12:43, 9 November 2012 diff hist +1,946 N Creating bridge interfaces (br0) for virtual hosts to use shared interface Created page with "=Creating bride interfaces (br0) for virtual hosts to use shared interface= There are two networking options when we create virtual machines *Virtual network and NAT *Shared ..."
- 12:42, 9 November 2012 diff hist +1,009 N Configuring ethernet port in trunk mode Created page with "=Configuring ethernet port in trunk mode= Assuming eth0 is to configured in trunk mode and VLAN 127 has to be used using 802.1q over eth0, follow these steps: (Note that devi..."
- 12:42, 9 November 2012 diff hist +295 N Network interface configuration Created page with "=Network interface configuration= *Configuring ethernet port in trunk mode *Creating bride interfaces (br0) for virtual hosts to use shared interface *[[Enabling wake..."
- 12:41, 9 November 2012 diff hist +69 N Network related configuration Created page with "=Network related configuration= *Network interface configuration"
- 12:41, 9 November 2012 diff hist +72 m Main Page
- 05:52, 9 November 2012 diff hist +663 N Ntpdate configuration Created page with "=ntpdate configuration= Sometimes we can get following message when we try to start ntpd service <pre> ntpd: Synchronizing with time server: [FAILED] Starting ntpd..."
- 05:51, 9 November 2012 diff hist +55 N Time server configuration Created page with "=Time server configuration= *ntpdate configuration"
- 05:51, 9 November 2012 diff hist +30 m Main Page
- 05:49, 9 November 2012 diff hist +63 N Web based tools or applications Created page with "=Web based tools or applications= *mediawiki configuration"
- 05:48, 9 November 2012 diff hist −166 m Main Page
- 05:47, 9 November 2012 diff hist +79 N Filesystem, partition or disk related tools Created page with "=Filesystem, partition or disk related tools= *Software raid configuration"
- 05:47, 9 November 2012 diff hist +49 m System administration tools
- 05:46, 9 November 2012 diff hist +29 m Securing remote shell access
- 05:45, 9 November 2012 diff hist +1,243 N Dstat Created page with "=dstat for monitoring io usage= We can use dstat for monitoring hard disk or IO usage. From man page we can see that 'dstat -M time,cpu,net,disk,sys,load,proc,topcpu' command..."
- 05:45, 9 November 2012 diff hist +85 N Monitoring tools Created page with "=Monitoring tools= *dstat *awstats configuration *logwatch configuration"
- 05:44, 9 November 2012 diff hist +22 m Main Page
- 05:42, 9 November 2012 diff hist +1,046 N Installing and configuring rssh to allow only scp and sftp Created page with "=Installing and configuring rssh to allow only scp and sftp= We can use yum on CentOS to install rssh. After installing edit file '<tt>/etc/rssh.conf</tt>' and uncomment belo..."
- 05:42, 9 November 2012 diff hist +85 N Rssh configuration Created page with "=rssh configuration= *Installing and configuring rssh to allow only scp and sftp"
- 05:42, 9 November 2012 diff hist +55 N Securing remote shell access Created page with "=Securing remote shell access= *rssh configuration"
- 05:41, 9 November 2012 diff hist +51 N Security tools Created page with "=Security tools= *Securing remote shell access"
- 05:41, 9 November 2012 diff hist +20 m Main Page
- 05:40, 9 November 2012 diff hist −1,797 m Basic mdadm configuration and commands
- 05:40, 9 November 2012 diff hist +488 N Configuring software RAID on server during installation Created page with "=Configuring software RAID on server during installation= #Install OS on hard-disks with software raid partitions. #Boot using 'Fedora resuce cd' or 'System rescue cd' and m..."
- 05:39, 9 November 2012 diff hist +61 m Software raid configuration
- 05:38, 9 November 2012 diff hist +569 N Reinstalling grub on RAID partition Created page with "=Reinstalling grub on raid partition= Sometimes just using auto-detect may not work and system may not boot when one of the raid hard-disks is removed. In such cases we need ..."
- 05:38, 9 November 2012 diff hist +41 m Software raid configuration
- 05:38, 9 November 2012 diff hist +764 N Booting machine after removing hard-disks from software raid array Created page with "=Booting machine after removing hard-disk from software raid array= When we try to boot after removing one hard-disk in some cases the system may boot properly. In other case..."
- 05:38, 9 November 2012 diff hist +72 m Software raid configuration
- 05:36, 9 November 2012 diff hist +5,046 N Basic mdadm configuration and commands Created page with "=Basic mdadm configuration and commands= ==Seeing information on running array== To see information on currently configured and running raid arrays and also status of differ..."
- 05:35, 9 November 2012 diff hist +74 N Software raid configuration Created page with "=Software raid configuration= *Basic mdadm configuration and commands"
- 05:34, 9 November 2012 diff hist +32 m Main Page
- 05:33, 9 November 2012 diff hist +436 N Tidy-rpm-cache Created page with "=tidy-rpm-cache.py (previous rm_obsolete_rpms.py)= We can download latest version of tidy-rpm from internet and then use it to delete obsolete packages from yum-cahce. This s..."
- 05:33, 9 November 2012 diff hist +47 N Package management tools Created page with "=Package management tools= *tidy-rpm-cache"
- 05:32, 9 November 2012 diff hist +60 N System administration tools Created page with "=System administration tools= *Package management tools"
- 05:32, 9 November 2012 diff hist +52 m Main Page
- 04:59, 9 November 2012 diff hist +415 N Configuring cisco switch as SNMP server Created page with "=Configuring cisco switch as SNMP server= Steps: #Go to '<tt>config t</tt>' and use #:<pre> #:: snmp-server enable informs #:: snmp-server community public ro #:</pre> Note..."
- 04:58, 9 November 2012 diff hist +45 m Switch configuration notes