yum command is easy to install software in your host. yum list installed Output all installed software yum update [softwarename] ex: yum update httpd it is able to update software by this command. yum list you can know the software which is able to install.

Subnet /n Subnet IP Count /32 255.255.255.255 1 /31 255.255.255.254 2 /30 255.255.255.252 4 /29 255.255.255.248 8 /28 255.255.255.240 16 /27 255.255.255.224 32 /26 255.255.255.192 64 /25 255.255.255.128 128 /24 255.255.255.0 256 /23 255.255.254.0 512 /22 255.255.252.0 1024 /21 255.255.248.0 2048 Subnet IPs The subnet mask is used to define the range of the network.
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compress tar.gz tar -zcvf xxx.tar.gz directory decompression tar.gz tar -zxvf xxxx.tar.gz