• Jul 29, 2024 •AustinLeath
0 likes • 7 views
for region in `aws ec2 describe-regions --output text | cut -f4` do echo -e "\nListing Instances in region:'$region'..." aws ec2 describe-instances --query 'Reservations[*].Instances[*].{Instance:InstanceId,Subnet:SubnetId}' --region $region done #This script is to be used with any AWS CLI configured environment, it will list any EC2 instances and their associated subnet network ID's in JSON format
• Sep 30, 2021 •LeifMessinger
0 likes • 9 views
touch /tmp/login1.txt /tmp/login2.txt while [ true ] do who | gawk '{ print $1 }' > /tmp/login2.txt comm -13 /tmp/login1.txt /tmp/login2.txt #Just a bit easier to read #diff /tmp/login1.txt /tmp/login2.txt cat /tmp/login2.txt > /tmp/login1.txt sleep 1 done
• Nov 14, 2021 •LeifMessinger
0 likes • 0 views
#!/bin/bash #Takes all the c and h files in the current directory and prints them #Yup, it's that easy for file in *.h *.hpp *.c *.cpp; do #If it exists if [ -f "$file" ]; then echo "//===============$file===============" cat $file fi done
• Oct 30, 2020 •LeifMessinger
0 likes • 2 views
#!/bin/bash #getDependencies.sh by Leif Messinger grep -Po '#include\s*"\K.+(?=")' | while read -r line ; do echo -n " $line" ./getDependencies.sh < $line done
• Jan 12, 2023 •LeifMessinger
0 likes • 3 views
#!/bin/bash #Originally made by Isaac Cook https://gist.github.com/icook/5400173 #Modified by Leif Messinger #upload_key.sh [server_ip [server2_ip [...]]] #To be run locally on a linux computer if [ -e ~/.ssh/id_rsa.pub ]; then echo "SSH Key already exists on local machine" else echo "Generating SSH key on local machine" ssh-keygen -t rsa #generates id_rsa and id_rsa.pub chmod -R 700 ~/.ssh #Sets permissions of ssh folder ssh-add #Adds keys (and passwords?) to ssh_agent. (hopefully doesn't require password) fi echo "Loading client public key into memory" pubKey=$(<~/.ssh/id_rsa.pub) for server do echo "Adding client public key to $server remote server authorized keys" #Idiot Isaac Cook didn't know about ssh-copy-id #ssh-copy-id even checks if your key already exists #In fairness, I didn't either until researching ssh-add ssh-copy-id -i ~/.ssh/id_rsa.pub $server #In theory, this should prompt for a username #ssh $server "mkdir -p ~/.ssh; #Make the folder if not already made # echo \"$pubKey\" >> ~/.ssh/authorized_keys; #Append your public key to the server's authorized_keys # chmod 700 ~/.ssh && chmod 600 ~/.ssh/authorized_keys" #Set the correct permissions of those files #echo "Adding server public key to local authorized keys" #ssh $server "ssh-copy-id -i ~/.ssh/id_rsa.pub \$SSH_CLIENT" #this might need some awk, as $SSH_CLIENT spits out clientip portnumber echo "Displaying server public key" ssh $server "cat ~/.ssh/id_rsa.pub" #Though, he did give me a good idea echo "Displaying keys authorized on $server (you can paste them in your authorized_keys file)" ssh $server "cat ~/.ssh/authorized_keys" #echo "Appending keys authorized on $server to your local authorized_keys" #ssh $server "cat ~/.ssh/authorized_keys" >> ~/.ssh/authorized_keys done echo "SSH keys schronized successfully!"
• Nov 19, 2022 •CodeCatch
0 likes • 1 view
name="John" echo ${name} echo ${name/J/j} #=> "john" (substitution) echo ${name:0:2} #=> "Jo" (slicing) echo ${name::2} #=> "Jo" (slicing) echo ${name::-1} #=> "Joh" (slicing) echo ${name:(-1)} #=> "n" (slicing from right) echo ${name:(-2):1} #=> "h" (slicing from right) echo ${food:-Cake} #=> $food or "Cake"