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Pipes and Redirections

Pipes (|) connect commands together — the output of one becomes the input of the next. Redirections (>, >>, <) send output to files or read input from files.

bash

# Pipe: send output of one command to another
ls -la | grep ".txt"

# Chain multiple pipes
cat logfile.txt | grep "error" | wc -l

# Redirect output to a file
ls > filelist.txt

# Append to a file
echo "new line" >> filelist.txt

# Redirect errors
command 2> errors.txt

Tip:Pipes are the secret weapon of Linux. They let you build powerful data processing pipelines from simple commands.

Pipes & Redirections

Pipes and Redirections