Tee

echo hi | cat

hi

echo hi | cat > /root/file
echo hi > /root/file

bash: /root/file: Permission denied
bash: /root/file: Permission denied

# Wrong echo hi sudo > /root/file
# Wrong sudo echo hi > /root/file
# Wrong sudo echo hi | sudo cat > /root/file

echo hi | tee tfile

hi

cat tfile

hi

echo hi | sudo tee /root/file # Correct
echo hi | sudo tee /root/file > /dev/null # if you don't wanna see the output

# see whats happening between commands
cat tfile | sort | uniq -d | head -3 | grep -iv "Milad" > z; cat < z;

# lets say some thing is wrong
cat tfile | sort | tee check | uniq -d | head -3 | grep -iv "Milad" > z; cat < z;
cat check

hi

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Lecture notes

• All lecture notes are available at github in ipynb format: https://github.com/ravexina/linux-notes.

• There are html exports of project available at: https://ravexina.github.io/linux-notes.

License

Linux Notes by Milad As (Ravexina) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

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