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Netadmins offre maintenant de l’hébergement WEB au Canada
Unzip plusieurs fichiers
Pour unzip plusieurs fichiers exemple a1.zip a2.zip etc …
unzip '*.zip'
unrar e -r -o- *.rar
Installer Openvpn sur Centos7
yum -y install epel-release yum -y install openvpn Installer ifconfig yum install net-tools
Optimisation de serveurs Windows
Calcul du temps de transfert
Trouver ce qui prends de la place sur votre disque
Fonctionne avec plusieurs types de disques
Utiliser son propre routeur avec Bell Fibe
Table Netmask
| Netmask | Inverse | /CIDR | Usable | Size |
|---|---|---|---|---|
| 0.0.0.0 | 255.255.255.255 | /0 | 4,294,967,294 | The Internet |
| 128.0.0.0 | 127.255.255.255 | /1 | 2,147,483,646 | 128 Class ‘A’s |
| 192.0.0.0 | 63.255.255.255 | /2 | 1,073,741,822 | 64 Class ‘A’s |
| 224.0.0.0 | 31.255.255.255 | /3 | 536,870,910 | 32 Class ‘A’s |
| 240.0.0.0 | 15.255.255.255 | /4 | 268,435,454 | 16 Class ‘A’s |
| 248.0.0.0 | 7.255.255.255 | /5 | 134,217,726 | 8 Class ‘A’s |
| 252.0.0.0 | 3.255.255.255 | /6 | 67,108,862 | 4 Class ‘A’s |
| 254.0.0.0 | 1.255.255.255 | /7 | 33,554,430 | 2 Class ‘A’s |
| 255.0.0.0 | 0.255.255.255 | /8 | 16,777,214 | 1 Class ‘A’ |
| 255.128.0.0 | 0.127.255.255 | /9 | 8,388,606 | 128 Class ‘B’s |
| 255.192.0.0 | 0.63.255.255 | /10 | 4,194,302 | 64 Class ‘B’s |
| 255.224.0.0 | 0.31.255.255 | /11 | 2,097,150 | 32 Class ‘B’s |
| 255.240.0.0 | 0.15.255.255 | /12 | 1,048,574 | 16 Class ‘B’s |
| 255.248.0.0 | 0.7.255.255 | /13 | 524,286 | 8 Class ‘B’s |
| 255.252.0.0 | 0.3.255.255 | /14 | 262,142 | 4 Class ‘B’s |
| 255.254.0.0 | 0.1.255.255 | /15 | 131,070 | 2 Class ‘B’s |
| 255.255.0.0 | 0.0.255.255 | /16 | 65,534 | 1 Class ‘B’ |
| 255.255.128.0 | 0.0.127.255 | /17 | 32,766 | 128 Class ‘C’s |
| 255.255.192.0 | 0.0.63.255 | /18 | 16,382 | 64 Class ‘C’s |
| 255.255.224.0 | 0.0.31.255 | /19 | 8,190 | 32 Class ‘C’s |
| 255.255.240.0 | 0.0.15.255 | /20 | 4,094 | 16 Class ‘C’s |
| 255.255.248.0 | 0.0.7.255 | /21 | 2,046 | 8 Class ‘C’s |
| 255.255.252.0 | 0.0.3.255 | /22 | 1,022 | 4 Class ‘C’s |
| 255.255.254.0 | 0.0.1.255 | /23 | 510 | 2 Class ‘C’s |
| 255.255.255.0 | 0.0.0.255 | /24 | 254 | 1 Class ‘C’ |
| 255.255.255.128 | 0.0.0.127 | /25 | 126 | 128 Hosts |
| 255.255.255.192 | 0.0.0.63 | /26 | 62 | 64 Hosts |
| 255.255.255.224 | 0.0.0.31 | /27 | 30 | 32 Hosts |
| 255.255.255.240 | 0.0.0.15 | /28 | 14 | 16 Hosts |
| 255.255.255.248 | 0.0.0.7 | /29 | 6 | 8 Hosts |
| 255.255.255.252 | 0.0.0.3 | /30 | 2 | 4 Hosts |
| 255.255.255.254 | 0.0.0.1 | /31 | 0 | 2 Hosts |
| 255.255.255.255 | 0.0.0.0 | /32 | 1 | 1 Host |