tee.md

tee

Read from standard input and write to standard output and files

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References

• man tee

Synopsis

tee [OPTION]... [FILE]...

If a FILE is -, copy again to standard output

Options

• -a, --append Append to the given FILEs, do not overwrite
• -i, --ignore-interrupts Ignore interrupt signals

Usage

Write

Save your input into files at the same time

tee file1 file2

Append

Append to file

cat file1 | tee -a file2

Differ > and >>

• tee -a : Write to both standard output and files
• >, >> : Only write to files!

cat file1 | tee -a file2
cat file1 | tee file2
# or ?
cat file1 > file2
cat file1 >> file2