navi/cheats/shell.cheat
2020-02-09 18:44:11 +05:30

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% Shell Usage
# Re-call last input with sudo
sudo !!
# Help
help cd / help dir (...)
# Finding Help
apropos directory / apropos search (...)
# Define custom startup screen
sudo nano /etc/motd
# Run a script as background process
python script.py &
# List all running process's
ps aux
# Kill a running process
sudo kill <12345>
% Shell System
# Get the current path
pwd
# Copy to clipboard
pwd | pbcopy
# Paste
pbpaste
# Get the current hostname
hostname
# Get the current users
users
# Get all info about the environment
env
# Show calendar
cal
# Show today's date
date
# Exit terminal
exit
% Shell Permissions
# Use -R option to change permissions recursively.
# List
ps -ef | grep apache | grep -v grep
# Change permissions
chmod 755 <index>
# Change group
chgrp <group-name> <index>
% Shell WordPress Files/Folder Permissions
# Let apache be owner
chown <www-data>:<www-data> -R *
# Change directory permissions rwxr-xr-x
find . -type d -exec chmod 755 {} \;
# Change file permissions rw-r--r--
find . -type f -exec chmod 644 {} \;
% Shell Directories
# List directory contents
ls
# List all directory contents
ll
# List all directory contents sorted by time edited
ls -alt
# List directory (wildcard matching)
ls *.<txt>
# List all files of type
find . -name *.<txt> -print
# Go back to previous directory
cd -
# Make (empty) directory
mkdir <dirname>
# Remove (empty) directory
rmdir <sample-dirname>
# Remove directory with all contents without prompt
rm -rf <sample-dirname>
# Remove directory contents and keep directory
rm -rf *
# Checkout directory
cd <sample-dirname>
% shell Symlinks
# Create symlink
ln -s <source-dirname> <destination-dirname>
# Update symlink
ln -sfn <source-dirname> <destination-dirname>
# Remove symlink
unlink <sample-dirname>
% Shell Files
# Make (empty) file
touch <filename-txt>
# Change creation date
touch t <yymmddhhmm> <filename>
# Change modified date
touch mt <yymmddhhmm> <filename>
# Duplicate file
cp <filename-txt> <filename-copy-txt>
# Copy/Page folder with content
cp -a <old-folder>/ <new-folder>
# Move/Rename file
mv <current-filename-txt> <new-filename-txt>
# Move/Rename file and prompt before overwriting an existing file
mv -i <current-filename-txt> <new-filename-txt>
# Remove file
rm <filename-txt>
# View file
less <filename-txt> / more <sample-filename-txt>
# Write to file (will overwrite existing content)
cat > <filename-txt>
# Search for a filename-(not content!) in the current directory
find <filename-txt>
# Search for a string inside all files in the current directory and subdrectories
grep -r <string> *
# Search and replace within file
sed -i 's/<original-text>/<new-text>/g' <filename-txt>
# MD5 hash for files
md5 <filename-txt>
# MD5 hash for folders
tar c <folder> | md5sum
# Encrypt file
openssl enc -aes-256-cbc -e -in <sample-filename-txt -out <sample-encrypted-txt>
# Decrypt file
openssl enc -aes-256-cbc -d -in <sample-encrypted> -out <sample-filename>
% Shell Server
# Access via ssh
ssh <username@remote>
# Copy file from server to local
scp <username@remote>:<file-to-send-path> <path-to-recieve>
# Copy file from local to server
scp <file-to-end> <username@remote>:<where-to-put>
# Escape files with spaces in name like this
<-path-to-file>\\\ <name-png>
% Shell System
# Show disc space
df -h
# Show disc space (inodes)
df -i
# Show disc space for current directory
du -hs
# Current processes (also CPS usage)
top or htop
# Show running php processes
ps aux | grep php
# Monitor error log (stream as file grows)
tail error.log -f -n 0
% Shell Apps
# Start appliction
open -a <programme>
# Open finder with current folder
open .
% Shell Variables
# Register variable
export <TESTING>=<Sample-Text>
# Echo variable
echo $<TESTING>
# Unset variable
unset <TESTING>
% Shell Output & Redirects
# Write to file
echo <Hello> > <hello-txt>
# Append content from a file to another file
cat <file1-txt> >> <file2-txt>
# Add the amount of lines, words, and characters to <file2-txt>
cat <file1-txt> | <word-count> | cat > <file2-txt>
# Sort the content of a file (like cat)
sort <hello.txt>
.txt
# Save to sorted content to a new file
cat <file1-txt> | sort > <sorted-file1-txt>
# Sort and remove duplicates and save to a new file
sort <file1-txt> | uniq > <uniq-file1-txt>