Remove specific line of files on linux

Question

I need to remove a particular line in a file crontab ex:

* * * * * root /home/linaro/funcao1.sh
* * * * * root /home/linaro/funcao3.sh
* * * * * root /home/linaro/funcao4.sh
* * * * * root /home/linaro/funcao5.sh

would like to delete the line

* * * * * root /home/linaro/funcao4.sh

Remembering that this file is not in crontab it will be imported according to the script

tried to use the sed but my deficiency in regular expressions did not allow me to make it work

sed '* * * * * root /home/linaro/funcao4.sh' /home/linaro/mycron.txt

Answer 1

Could use grep in the form:

grep -v "* * * * * root /home/linaro/funcao4.sh" /etc/crontab > /home/usuario/mycron
mv /home/usuario/mycron > /etc/crontab

Answer 2

Use sed -i to replace in the file itself:

sed -i '/* * * * * root \/home\/linaro\/funcao4.sh/d' arquivo

Answer 3

I managed to solve ^^

sed '/* * * * * root \/home\/linaro\/funcao4.sh/d' /etc/crontab  > /home/linaro/mycron
cat /home/linaro/mycron > /etc/crontab
rm -rf mycron