| pwd | Will print your present working directory |  | 
  | ls | Will print all files and directories within your present working directory | If you put a path (absolute or relative) after lsit will print the content of this directory) e.g.ls /homewill print the content of the folder home; If you add-lit will print the files and directories in a list that contains additional information such as permissions | 
  | mkdir | Will make a new directory in your present working directory | mkdir GWASwill make a directory calledGWAS | 
  | cd | Change directories | If you only enter cdwithout an absolute or relative path, it will change to your home directory; Enteringcd ..will change your current directory to the parent folder; Enteringcdwith an absolute or relative path will change the directory to the respective folder | 
  | nextflow run genepi/nf-gwas -c <nextflow.config> -r v1.X.X –profile singularity | Will run the gwas pipeline | Adding -bgwill continue to run the pipeline even if you close the command line; Adding-resumewill continue the pipeline with the files that have already been generated by a run of the same config file (e.g. if you only change the settings for the annotation files, it does not have to rerun the whole pipeline); Exchange<nextflow.config>with the name of your config file; Version of the pipeline is adapted simply by changing the version (v1.X.X); Instead ofsingularityalsodockerandslurmare currently available | 
  | htop | Will display the current processes that are running | Hit qto quit | 
  | vi | A text editor in Linux that can display the content of a file, an alternative is for example nano(it can be used in the same way, but the advantage is that you can immediately start to modify the file) | E.g. enter vi first-gwas.configto view the content of the first-gwas.config file;To quit just type in the following command and hit enter:q!; After running a GWAS you might notice a.nextflow.logfile in you folder when you check via FileZilla but you don’t see them if you enter ls in the command line because the dot in the beginning of the file means its hidden. However, you can still look at the content of such a file by enteringvi .nextflow.log |