Network Troubleshoot

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Configuring Routing

Configuring ConfiguringRouting Routing--Temporary Temporary [root@comp1 [root@comp1~]# ~]#echo echo11 > > /proc/sys/net/ipv4/ip_forward /proc/sys/net/ipv4/ip_forward

Configuring ConfiguringRouting Routing--Permanent Permanent [root@comp1 ~]# vi /etc/sysctl.conf [root@comp1 ~]# vi /etc/sysctl.conf

Load Loadin insysctl sysctlsetting settingat atruntime runtime [root@comp1 ~]# sysctl p [root@comp1 ~]# sysctl p

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Network Monitoring Tools

To Toview viewnetwork networkconnections connectionswith withport portno no ss [root@comp1~]# netstat ant () [root@comp1~]# netstat ant ()

To Toview viewremote remotenetwork networkconnections connectionsport port no noss [root@comp1~]# [root@comp1~]# nmap nmap address>

To Toview viewhow howlong longsystem systemis isbeen beenrunning running [root@comp1~]# [root@comp1~]#uptime uptime

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Network Monitoring Tools

Displays Displaysdynamic dynamicrealtime realtimeview viewof ofrunning runningsystem system [root@comp1~]# top [root@comp1~]# top

To Toview viewcurrent currentprocesses processes [root@comp1~]# ps ef [root@comp1~]# ps ef

To Toview viewthe thetime timeof of last lastreboot reboot [root@comp1~]# [root@comp1~]#last lastreboot reboot

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Network Monitoring Tools

To Toview viewand andsetup setupdifferent differentnetwork network configurations configurations [root@comp1~]# neat [root@comp1~]# neat

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Network Monitoring Tools

To Toview view [root@comp1~]# [root@comp1~]#rpcinfo rpcinfo pp

To Toview view [root@comp1~]# [root@comp1~]#traceroute traceroute

To Toview view [root@comp1~]# [root@comp1~]#iptraf iptraf

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Network Monitoring Tools

To Toview view [root@comp1~]# tcpdump eth0 [root@comp1~]# tcpdump eth0

To Toview view [root@comp1~]# [root@comp1~]#ethtool ethtool

To Toview view [root@comp1~]# [root@comp1~]#gnome-system-moniter gnome-system-moniter

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