• Aug 7, 2023 •C S
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# Three ways of checking if a file exists in a shell script FILE=/etc/resolv.conf if test -f "$FILE"; then echo "$FILE exists." fi if [ -f "$FILE" ]; then echo "$FILE exists." fi if [[ -f "$FILE" ]]; then echo "$FILE exists." fi
• Mar 20, 2023 •C S
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// check version node -v || node --version // list installed versions of node (via nvm) nvm ls // install specific version of node nvm install 6.9.2 // set default version of node nvm alias default 6.9.2 // switch version of node nvm use 6.9.1
• Nov 23, 2021 •LeifMessinger
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#!/bin/bash #Makes a directory ./monkeys and puts every single bored bored ape yacht club monkey in there #Leif Messinger let OFFSET=0 let BATCHSIZE=50 let LIMIT=100 mkdir monkeys function parseResults(){ sed 'y/,/\n/' | sed -e '/storage.opensea/d' -e '/https:\/\/lh3.googleusercontent.com\/Ju9CkWtV-1Okvf45wo8UctR-M9He2PjILP0oOvxE89AyiPPGtrR3gysu1Zgy0hjd2xKIgjJJtWIc0ybj4Vd7wv8t3pxDGHoJBzDB=s120/d' | egrep '"image_url":"(.*)"' | tr -d '\"' | sed 's/image_url://' } function downloadMonkeys(){ while read -r line; do name=`echo "$line" | sed 's/https:\/\/lh3.googleusercontent.com\///'` wget -q -O "./monkeys/$name.png" "$line" & done } function queryMonkeys(){ let progress=($OFFSET*100)/$LIMIT echo "Progress: $progress%" result=`curl -s --request GET --url "https://api.opensea.io/api/v1/assets?order_direction=desc&offset=$OFFSET&limit=$BATCHSIZE&collection=boredapeyachtclub"` if [[ "$result" =~ "Request was throttled" ]] || [ "$result" == "" ]; then #Retry download sleep 10 else #Download Monkeys echo "$result" | parseResults | downloadMonkeys let OFFSET+=$BATCHSIZE fi #If not out of bounds, recurse if [ "$OFFSET" -lt "$LIMIT" ] || [[ "$result" =~ '"assets":[]' ]]; then queryMonkeys fi } echo "Downloading your monkeys into ./monkeys asynchronously." queryMonkeys
• Sep 30, 2021 •LeifMessinger
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touch /tmp/login1.txt /tmp/login2.txt while [ true ] do who | gawk '{ print $1 }' > /tmp/login2.txt comm -13 /tmp/login1.txt /tmp/login2.txt #Just a bit easier to read #diff /tmp/login1.txt /tmp/login2.txt cat /tmp/login2.txt > /tmp/login1.txt sleep 1 done
• Jan 12, 2023 •LeifMessinger
#!/bin/bash #Originally made by Isaac Cook https://gist.github.com/icook/5400173 #Modified by Leif Messinger #upload_key.sh [server_ip [server2_ip [...]]] #To be run locally on a linux computer if [ -e ~/.ssh/id_rsa.pub ]; then echo "SSH Key already exists on local machine" else echo "Generating SSH key on local machine" ssh-keygen -t rsa #generates id_rsa and id_rsa.pub chmod -R 700 ~/.ssh #Sets permissions of ssh folder ssh-add #Adds keys (and passwords?) to ssh_agent. (hopefully doesn't require password) fi echo "Loading client public key into memory" pubKey=$(<~/.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!"
• Feb 22, 2022 •LeifMessinger
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#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 input sed -z -r -e 's/\./\\\./g ; s/\-/\\\-/g' -e 's/\n/\)\|\(/g' -e 's/\|\($//' -e 'i/\(' -e 'a/!d' $1 | sed -r -f - $2