sed

Stream editor for text transformation.

$ sed

sed scriptFile(s)

Edit in place (-i)Extended regex (-E)

Examples

# Replace text
sed 's/old/new/g' file.txt

# Edit in place
sed -i 's/old/new/g' file.txt

# Backup and replace
sed -i.bak 's/old/new/g' file.txt

# Delete matching lines
sed '/pattern/d' file.txt

# Extended regex
sed -E 's/[0-9]+/NUMBER/g' file.txt