Add hints on installing system dependencies on Linux to Readme.md

Change-Id: Id9099287ffc6dea40740688646077152e7b8e5e2
diff --git a/Readme.md b/Readme.md
index fae6d40..4c3a15a 100644
--- a/Readme.md
+++ b/Readme.md
@@ -18,6 +18,22 @@
 R client package to access the [web service API](https://github.com/KorAP/Kustvakt/wiki) of the [KorAP Corpus Analysis Platform](https://korap.ids-mannheim.de/) developed at the [IDS Mannheim](http://www.ids-mannheim.de/)
 
 ## Installation
+### System Dependencies on Linux
+`RKorAPClient` uses some R packages with system depencies you might need to install first:
+```bash
+#### Debian / Ubuntu
+sudo apt install r-base-dev libcurl4-gnutls-dev libxml2-dev libsodium-dev
+
+#### Fedora / CentOS >= 8
+sudo dnf install R-devel libcurl-devel openssl-devel libxml2-devel libsodium-devel
+
+#### CentOS < 8
+sudo yum install R-devel libcurl-devel openssl-devel libxml2-devel libsodium-devel
+
+#### Arch Linux
+pacman -S base-devel gcc-fortran libsodium curl
+```
+### Package installation
 #### CRAN version:
 ```r
 install.packages("RKorAPClient")