configure | bits

Linux 9 - Working the Command Line

Apr 14, 2012 · 4 min read · configure commands linux info

Bash Shell environment PATH environment variables history completion commands The shell that a user uses is defines in /etc/passwd testuser:x:1001:1001:testuser user:/home/testuser:/bin/bash The settings for how bash behaves are stored in a couple different places /etc/profile# /etc/profile: system-wide .profile file …

Linux 8 - RPM and yum package management

Apr 3, 2012 · 9 min read · configure centos commands linux

rpm rpm2cpio alien yum /etc/yum.conf /etc/yum.repos.d yum downloader yum is alike like apt-get is in debian like distribsyum install open-ssh clients[root@localhost ovidiu]# yum install openssh-clients Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirrors.ch-center.com * extras: mirr…

Linux 6 - Manage Shared Libraries

Mar 20, 2012 · 2 min read · linux configure

what are shared libraries determining associated libraries configuring system ldd, lddconfig ld.so.cache, ld.so.conf.d A shared library or shared object is a file that is intended to be shared by executable files and further shared objects files. Modules used by a program are loaded from individual shared objects into…

Linux 5 - The Boot Manager

Mar 18, 2012 · 2 min read · linux debian configure commands centos info

LILO GRUB BackUP the MBR LILO is rarely used the LILO configuration is stored in /etc/lilo.conf Explanation: –boot → what device it’s going to boot from (in this case the first serialATA –map → LILO creates a map file to say what is mapped where –install → default, leave this boot.b as the default –prompt → does it pr…

Linux 4 – Hard Disk Layout

Mar 15, 2012 · 2 min read · configure commands linux info

Partitons and Disk Filesystems mount points swap space design considerations Important folders in Linux/boot → (about 100MB+ is fine) for kernel, initrdcan not be read if software raid is present/home → user related folders & files, configuration files, etc/etc → configuration files, system wide/root → root’s home…

Spanning Tree Design

Nov 20, 2011 · 2 min read · ccna 3 port-blocking configure cisco stp info

Optimizing STP topology. In the first topology an Access Layer switch is designated as a root bridge for the entire network. Choosing a good root bridge should be based on: Performance Redundancy Packets should travel from an access layer switch to a distribution layer switch to a core layer switch without the …

Basic IPv4 / IPv6 Routing

Nov 20, 2011 · 2 min read · routing protocol routes configure cisco commands

During your career as a Cisco network engineer you will have to deal understanding IPv6 address structure. So in this lab scenario you will learn to configure IPv4 and IPv6 networks on two routers then using RIP routing protocol you will configure WAN connectivity between. This lab has been created using …

Configurare topologie simpla GNS3 partea a 3-a

Sep 2, 2011 · 5 min read · routes ccna 2 gns3 routing protocol configure protocols cisco info

Obiective rutarea statica Configurare Vizualizare Depanare Odata puse ip-urile pe toate interfetele si pe toate PC-urile mai ramane configurat protocolul de rutare. Un router trebuie sa stie unde sa duca pachetele, acesta foloseste tabela de rutare, fara informatii actualizate acesta nu poate lua decizii corecte. Rout…

CDP

Sep 1, 2011 · 3 min read · ccna 2 gns3 configure basic cisco cdp commands info

Cisco Discovery Protocol - bun pentru obtinerea informatiilor de la alte routere sau swtich-uri direct conectate. - se trimit mesaje periodice (60s) - default pornit - contin informatii de genul: - tipul de device - interfetele cu care au legaturi - versiuni ale IOS - modelul device-ului Poate fi folosit ca un tool pe…

Configurare topologie simpla GNS3 partea a 2-a

Aug 31, 2011 · 6 min read · wireshark routes ccna 2 gns3 routing protocol configure basic protocols cisco part 2 commands

Continuarea configurarilor din topologia anterioara Obiective: Salvarea configuratilor (Topologie, Routere, PC-uri) Configurarea interfetei seriale de pe R2 Configurarea interfetei ethernet de pe R2 Altele Captura traficului prin Wireshark Salvarea configuratiilor Preambul: Routere/Switch-uri #copy running-confi…

Configurare topologie simpla GNS3

Aug 30, 2011 · 6 min read · routes ccna 2 linux routing protocol router hardware configure basic cisco commands

Topologie CCNA 2 3 routere 2 switch-uri simple 3 PC-uri Configurare adrese IP pentru host-uri sudo suhostname [nume]ifconfig eth0ifconfig eth0 <IP> netmask <NM> uproute add default gw <GW> eth0 Configurarea consolei si a liniilor virtuale VTY R1(config)#line console 0R1(config-line)#password ciscoR1(…

Port security

Feb 27, 2011 · 4 min read · ccna 3 port security configure switchport cisco commands

Securitatea la switch de nivelul de tip acces a) Port security b) port protected c) Port blocked d) Acces la switch fara parola e) Storm control a) Default nu e pornit Port Security Tipuri de atacuri oprite de Port Security - MAC address spoofing - schimbarea MAC-ului asignat de vendor cu un altul - Se aplica doar pen…

OSPF

Feb 6, 2011 · 10 min read · ccna 2 routing protocol configure basic ospf commands info

Open Shortest Path First protocol de rutare link state direct competitor pentru EIGRP (proprietar CISCO) Protocol de rutare classless Scalabil prin folosirea de zone Metrica valoare arbitrara denumita cost CISCO IOS foloseste bandwidth administrativ in calculul metricii Avantaje Convergenta mai rapida decat RIP (excep…

Routing protocols

Dec 5, 2010 · 3 min read · routes ccna 2 configure cisco

Some stuff about static and dynamic routing protocols, and IP assignment to interfaces. Directly connected: When configuring an interface with an IP address that interface will become a host on that network (it will have it’s own ip address) Before any static or dynamic routing is configured on a router, the router on…

Configuring a router

Dec 5, 2010 · 3 min read · ccna 2 configure basic cisco commands

Basic Router Configuration When configuring a router, certain basic tasks are performed including: Naming the router Setting passwords Configuring interfaces Configuring a banner Saving changes on a router Verifying basic configuration and router operations The first prompt appears at user mode. User mode allows you t…