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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"
#Leif Messinger#For when you want to search a lot of words in a file fast#Arg 1 is the argument the list of words you want to search#Arg 2 is the file you want to search#-z means that it looks at the file as a whole, just treating newlines a characters.#-r is regex. Needed for $, even tho the documentation says you don't need it. They are liars.#First command replaces all . with \. and all - with \-#Second command takes all newlines and replaces them with )|(#Third command takes the trailing |( and deletes it#Forth command puts a /( at the start#Fith command puts /!d at the end. This tells it to not delete any lines that match the pattern.#The second sed takes the output of the first sed as a command that searches any of the combined words#-f - takes a command from the inputsed -z -r -e 's/\./\\\./g ; s/\-/\\\-/g' -e 's/\n/\)\|\(/g' -e 's/\|\($//' -e 'i/\(' -e 'a/!d' $1 | sed -r -f - $2
# Update all npm packages under the scope defined by the PREFIX variable ("foo").PREFIX="foo"; npm ls | grep "$PREFIX" | awk -F/ '{print $NF}' | sed 's/@.*//' | xargs -I package npm update @"$PREFIX"/package
CLIENT_VPN_ID="cvpn-endpoint-xxxxxxxxxxxx"for region in $(aws ec2 describe-regions --query "Regions[].RegionName" --output text); doecho "Searching in region: $region"aws ec2 describe-client-vpn-endpoints --region $region --query "ClientVpnEndpoints[?ClientVpnEndpointId=='$CLIENT_VPN_ID']" --output tabledone
#!/bin/bash#Originally made by Isaac Cook https://gist.github.com/icook/5400173#Modified by Leif Messinger#upload_key.sh [server_ip [server2_ip [...]]]#To be run locally on a linux computerif [ -e ~/.ssh/id_rsa.pub ];thenecho "SSH Key already exists on local machine"elseecho "Generating SSH key on local machine"ssh-keygen -t rsa #generates id_rsa and id_rsa.pubchmod -R 700 ~/.ssh #Sets permissions of ssh folderssh-add #Adds keys (and passwords?) to ssh_agent. (hopefully doesn't require password)fiecho "Loading client public key into memory"pubKey=$(<~/.ssh/id_rsa.pub)for serverdoecho "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-addssh-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 portnumberecho "Displaying server public key"ssh $server "cat ~/.ssh/id_rsa.pub"#Though, he did give me a good ideaecho "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 $server "cat ~/.ssh/authorized_keys" >> ~/.ssh/authorized_keysdoneecho "SSH keys schronized successfully!"
#!/bin/bash#Changes the remote url from https to ssh.#Only works for github, because I'd have to store a dictionary of every https to ssh url otherwise.#Made using Bing Chat# Get the remote URL from the consoleREPO_URL=$(git config --get remote.origin.url)# Check that REPO_URL contains https://github.comif [[ $REPO_URL == *"https://github.com"* ]]; then# Replace https with ssh in the URL# Change the remote URL to the SSH versiongit remote set-url origin "$REPO_URL"elseecho "Error: REPO_URL does not contain https://github.com" >&2exit 1fi