Network bonding is a method of combining (joining) two or more network interfaces together into a single interface. It will increase the network throughput, bandwidth and will give redundancy. If one interface is down or unplugged, the other one will keep…
M.
MegaCLI CheatSheat
This is my cheatseat for megacli, i am using this to peek most of the time.originated from post in this link. Adapter parameter -aNThe parameter -aN (where N is a number starting with zero or the string ALL) specifies the…
M.
MegaCli command to blink disk
Start blinking
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MegaCli -pdlocate physdrv \[E:s\] a0 |
Stop blinking
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MegaCli -pdlocate stop physdrv \[252:0\] a0 |
D.
DDOS and Flooding Detection Apache Webserver (Updated)
List the the connection status and sort to identify attack source
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#netstat -anp |grep 'tcp\|udp' | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort –n #netstat -n | grep :80 |wc –l or check sync netstat -n | grep :80 | grep SYN |wc –l |
netstat -ntu | awk ‘{print $5}’ | cut -d: -f1 | sort | uniq -c | sort -n Based on port
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netstat -n -p TCP | grep SYN_RECV | grep :80 |
Get basic information on which IPs…
F.
Find the user having high Inode usage
We can find the inode usage (Number of files) owned by each user/directory, especially useful in VPS. Each VPS will have inode limits (the maximum number of files that can be created in that VPS) For example If the inode…