Sidharth_CLI_Drills_II

Sidharth_CLI_Drills_II.sh

# CLI Drill 2 

# ===== Pipes =====
# Question 1 
echo "Downloading file..." 
wget https://raw.githubusercontent.com/bobdeng/owlreader/master/ERead/assets/books/Harry%20Potter%20and%20the%20Goblet%20of%20Fire.txt 2> log.txt -O book.txt 

# Question 2 
echo -e "\n\nTop 3 lines"
head -n 3 book.txt 

# Question 3 
echo -e "\n\nBottom 10 lines" 
tail -n 10 book.txt 

# Question 4 
# word: Harry
echo -e "\n\nHarry Word Count..."
grep -io harry book.txt | wc -l 

# word: Ron
echo -e "\n\nRon Word Count..." 
grep -io ron book.txt | wc -l 

# word: Hermione 
echo -e "\n\nHermione Word Count..."
grep -io hermione book.txt | wc -l 

# word: Dumbledore 
echo -e "\n\nDumbledore Word Count..."
grep -io dumbledore book.txt | wc -l

# Question 5
echo -e "\n\nLines in the range 100-200..."
awk 'FNR==100,FNR==200 {print FNR ":" $0}' book.txt

# Question 6 
echo -e "\n\nUnique words..." 
tr ' ' '\n' < book.txt | sort | uniq | wc -l 

# ===== Process =====
# Question 1
ps aux | grep brave 

# Question 2 
pkill -9 brave

# Question 3 
ps aux --sort -pcpu | head -n 4

# Question 4
ps aux --sort -pmem | head -n 4

# Question 5 
echo -e "\n\nStarting server on 8000..."
gnome-terminal -- python3 -m http.server 8000 

# Question 6 
pkill -9  python 

# Question 7 
echo -e "\n\nStarting server on 90"
sudo gnome-terminal -- python3 -m http.server 90 

# Question 8 
sudo lsof -i 

# Question 9 
sudo lsof -i:5432 | grep LISTEN

# ===== Managing Software ===== 
# Question 1 
sudo apt install nginx vim htop 

# Question 2 
sudo apt remove nginx

# ===== Misc =====
# Question 1 
ip route | grep default 

# Question 2 
nslookup google.com 

# Question 3 
ping -c1 8.8.8.8

# Question 4
# node command  
which node 

# code command 
which code