Update 3 files

• /exercises/UNIX_HPC_cheat_sheet.md
• /exercises/UNIX_HPC_exercise_instructions.md
• /README.md

exercises/UNIX_HPC_cheat_sheet.md

@@ -27,6 +27,7 @@ cp foo.txt bar.txt                                # Copy file
 mv foo.txt bar.txt                                # Move/Rename file
 rm foo.txt                                        # Delete foo.txt
 rm *                                              # Delete all files in current directory 
+ln -s foo bar                                     # Create a link 'bar' to the file 'foo'
 ```
 
 ## Read and manipulate files
@@ -39,6 +40,7 @@ tail foo.txt           # Print bottom 10 lines of file
 nano foo.txt           # Simple file editor
 vi foo.txt             # Advanced file editor 
 wc foo.txt             # List number of lines words and characters in the file
+cut -d [delimiter] -f [field] foo.txt     # Cuts out the specified fields that are separated by the specified delimiter     
 ```
 
 ## Input and Output
@@ -47,7 +49,43 @@ wc foo.txt             # List number of lines words and characters in the file
 echo "Hello world!"         # Print statement to standard output
 echo "foo" > bar.txt        # Direct output into file. Overwrites file if it already exists.
 echo "foo" >> bar.txt       # Direct output into file and append if it already exists. 
-command 1 | command2        # Directs output from command1 as standard input into command2    
+command1 | command2         # Directs output from command1 as standard input into command2    
+```
+<br><br>
+
+
+
+# SLURM Cheat Sheet
+
+## Connect to Science Cluster
+
+```bash
+ssh shirtname@cluster.s3it.uzh.ch
+```
+
+
+## Submitting jobs
+
+In a script `myjob.sh`:
+```bash
+#!/usr/bin/env bash
+#SBATCH --cpus-per-task=[number]
+#SBATCH --mem=[memory]
+#SBATCH --time=[hr:min:sec]
+#SBATCH --job-name=[name]
+#SBATCH --output=[name]_%j.out
+#SBATCH --error=[name]_%j.err
+
+# load any required modules 
+module load [module name]
+
+command1
+command2
+command3
+```
+Submit script as job to the computing nodes:
+```bash
+sbatch myjob.sh
 ```