Update README.md

README.md

@@ -2,12 +2,35 @@
 
 The fastest as well as the most wicked TCP congestion control "algorithm". There shouldn't be too many people knowing this secret or the world will be ruined.
 
-## Usage:
+<b>You need root privilege to run all following commands.</b>
+
+## Build:
 ```bash
 make
 insmod tcp_const.ko # Require root privilege
 ```
 
+## Prerequisites:
+
+For Debian-based distros(Debian/Ubuntu/Linux Mint/Kali,etc):
+```bash
+apt install build-essential linux-headers-$(uname -r)
+```
+For Redhat distro(CentOS/RHEL/Fedora/openEuler,etc):
+```bash
+# If you don't have dnf, use yum instead
+dnf groupinstall "Development Tools"
+dnf in kernel-devel kernel-headers
+```
+For Arch Linux:
+```bash
+pacman -S base-devel linux-headers
+```
+For OpenSUSE:
+```bash
+zypper in make automake gcc gcc-c++ kernel-devel kernel-default-devel
+```
+
 ## Troubleshooting:
 
 If compilation failed and it said the function signature does not match, simply delete those two unnamed parameters in `static void const_main(struct sock *sk,u32,int,const struct rate_sample *rs)`