first command

file

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+whoami 
+ps aux 
+uname
+sudo apt update 
+sudo apt upgrade
+sudo apt install nginx
+sudo systemctl start nginx
+ps
+grep 
+ps aux | grep nginx
+ps -a 
+vim 
+man 
+cal 
+date
+ls 
+mv 
+cd 
+cp 
+rm 
+touch 
+clear 
+echo 
+cat
+nano 
+uname 
+find 
+grep (regex) 
+head
+tail 
+cat 
+less 
+less | grep 
+tail 
+kill all
+sudo 
+top 
+htop
+uptime