{"id":147,"date":"2024-12-18T05:58:03","date_gmt":"2024-12-18T05:58:03","guid":{"rendered":"https:\/\/techkubo.com\/linux\/?p=147"},"modified":"2025-05-28T18:03:09","modified_gmt":"2025-05-28T18:03:09","slug":"linux-tee-command","status":"publish","type":"post","link":"https:\/\/techkubo.com\/linux\/linux-tee-command\/","title":{"rendered":"Linux – tee Command"},"content":{"rendered":"\n

The tee<\/code> command is used to read from standard input and write to both standard output and files simultaneously. This allows you to view the output of a command while also saving it to a file. It is commonly used in conjunction with other commands in pipelines.<\/p>\n\n\n\n

Initial Example<\/h2>\n\n\n\n

Using tee<\/code> to save the output of a command to a file while still displaying it on the terminal:<\/p>\n\n\n\n

echo "Hello, world!" | tee output.txt<\/pre><\/div>\n\n\n\n
<\/p>\n\n\n\n
TEE Parameters<\/h2>\n\n\n\n
Parameter<\/th>Description<\/th><\/tr><\/thead>
-a, --append<\/code><\/td>Append the output to the specified files instead of overwriting them.<\/td><\/tr>
-i, --ignore-interrupts<\/code><\/td>Ignore interrupt signals during execution.<\/td><\/tr>
-p<\/code><\/td>Operate in a more suitable mode when handling pipes.<\/td><\/tr>
--output-error[=MODE]<\/code><\/td>Define behavior upon encountering a write error. Options include warn<\/code>, warn-nopipe<\/code>, exit<\/code>, exit-nopipe<\/code>.<\/td><\/tr>
--help<\/code><\/td>Display help information and exit.<\/td><\/tr>
--version<\/code><\/td>Show version information and exit.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
<\/p>\n\n\n\n
Examples<\/h2>\n\n\n\n
1. Basic Usage<\/h4>\n\n\n\n
To display the output and save it to a file:<\/p>\n\n\n\n
echo "Sample text" | tee file.txt<\/pre><\/div>\n\n\n\n
2. Append to a File<\/h4>\n\n\n\n
To append the output to a file instead of overwriting it, use the -a<\/code> option:<\/p>\n\n\n\n
echo "Additional text" | tee -a file.txt<\/pre><\/div>\n\n\n\n
3. Using tee<\/code> with Pipes<\/h4>\n\n\n\n
To use tee<\/code> in a pipeline, saving intermediate output to a file while passing it to the next command:<\/p>\n\n\n\n
ls -l | tee file.txt | grep "pattern"<\/pre><\/div>\n\n\n\n
4. Writing to Multiple Files<\/h4>\n\n\n\n
To write the output to multiple files simultaneously:<\/p>\n\n\n\n
echo "Multi-file text" | tee file1.txt file2.txt<\/pre><\/div>\n\n\n\n
5. Combining tee<\/code> with sudo<\/code><\/h4>\n\n\n\n
To write to a file that requires elevated permissions, combine tee<\/code> with sudo<\/code>:<\/p>\n\n\n\n
echo "Protected text" | sudo tee \/protected\/file.txt<\/pre><\/div>\n\n\n\n
<\/p>\n\n\n\n
Linux Playground<\/h2>\n\n\n\n