README.md

🗃 Files, Search & Handling Text

• 🗃 Files, Search & Handling Text
  • 🗃 Files
  • 🔍 Search
  • 📝 Handling Text
  • 💾 Backups

🗃 Files

# REDIRECT ------------------------------------------
# Stdin <
cat < file.txt

# Stout >
echo "Hola" > file.txt
echo "Hola 2" >> file.txt
date > `date +”%Y%m%d”`.txt

# Sterr 2>
grep hello /etc/* 2> /dev/null

# PIPES ---------------------------------------------
# Lines / Words / Chars
echo "Hola vale" | wc
echo "B\nA\nC" | sort

# TR ------------------------------------------------
# Change characters
tr this_chars that_chars
echo "Hola vale" | tr ' ' '_'

# Upper case
tr [:lower:] [:upper:]

# Trim
tr -d this_chars

# Squeeze spaces
tr -s ' '

# All in one line
tr -s '\n' ' '

# SED -----------------------------------------------
# Stream editor
# It doesnt change the file, just outputs it

# -i, change file
# -E, extended regex

# Replace N instance per line
sed 's/regexp/replace/<N>' file

# Replace global per line
sed 's/regexp/replace/g' file

# If regex contains /
sed 's!regexp!replace!g' file

https://www.howtogeek.com/562941/how-to-use-the-awk-command-on-linux/

💾 Backups

• GUI Tool: Timeshift

# Only copies differences since last backup
rsync -aAXv --delete --exclude={pathA, pathB} /source /target