• 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} #=> $food or "Cake"
• Oct 15, 2022 •CodeCatch
0 likes • 145 views
awk '\ { for (i=1; i<=NF; i++) { ++D[$i]; } }\ END { for (i in D) { print i, D[i] } }\ ' words.txt | sort -nr -k 2
• Nov 4, 2023 •LeifMessinger
0 likes • 7 views
#!/bin/bash git status echo "Do you want to add all changed files?" select yn in "Yes" "No"; do case $yn in Yes ) break;; No ) exit 1;; esac done git add -u git status echo "Does this look right?" select yn in "Yes" "No"; do case $yn in Yes ) break;; No ) exit 2;; esac done git commit echo "Do you want to push?" select yn in "Yes" "No"; do case $yn in Yes ) break;; No ) exit 2;; esac done git push
• Nov 14, 2021 •LeifMessinger
0 likes • 0 views
#!/bin/bash #Takes all the c and h files in the current directory and prints them #Yup, it's that easy for file in *.h *.hpp *.c *.cpp; do #If it exists if [ -f "$file" ]; then echo "//===============$file===============" cat $file fi done
• Apr 3, 2025 •LeifMessinger
0 likes • 4 views
#!/usr/bin/env bash #Splits a command across a number of CELL machines user=$(whoami) if [[ -z $user ]]; then echo "whoami failed. Exiting..." exit 1 fi command="$1" if [[ -z $command ]]; then echo "Need to put in a command." exit 1 fi shift array=("$@") let start=8 let stop=18 for ((i = $start; i <= $stop; i++)); do extraZero=$(if [[ "$i" -lt 10 ]]; then echo "0"; fi) domain="CELL${extraZero}${i}-CSE.ENG.UNT.EDU" let "index = i - start" echo ${#array[@]} if [[ ${#array[@]} != 0 ]] && [[ $index -ge ${#array[@]} ]]; then echo "$index > ${#array[@]}" break fi ssh -o StrictHostKeyChecking=accept-new "${user}@${domain}" -t "$command ${array[$index]}" & done
• Oct 17, 2023 •C S
2 likes • 17 views
# ---------------- FIREWALL STEPS ---------------- # Check if firewalld is installed and running sudo systemctl status firewalld # If it's not running, you can start and enable it sudo systemctl start firewalld sudo systemctl enable firewalld # Add a rule to allow traffic on port 6006. Port 6006 is the default port that storybook runs on. sudo firewall-cmd --permanent --add-port=6006/tcp # Reload the firewall for the changes to take effect sudo firewall-cmd --reload # Check the list of allowed ports sudo firewall-cmd --list-ports # ---------------- NGINX STEPS ---------------- # Install Nginx (if not already installed) sudo yum install nginx # Start and enable Nginx sudo systemctl start nginx sudo systemctl enable nginx # Copy your storybook-static directory to a location that Nginx can serve from. # The default web root directory for Nginx is /usr/share/nginx/html. sudo cp -r /path/to/storybook-static /usr/share/nginx/html/ # Adjust file permissions if needed to ensure that Nginx can read the files sudo chown -R nginx:nginx /usr/share/nginx/html/storybook-static # Put the following server block in /etc/nginx/conf.d/storybook.conf server { listen 6006; server_name your_domain.com; location / { root /usr/share/nginx/html/storybook-static; index index.html; } } # Test the Nginx configuration for syntax errors sudo nginx -t # If there are no errors, reload Nginx to apply the changes sudo systemctl reload nginx