You want to run a command in a hosted server but you don’t have su permissions. There are directories that have different owners/permissions, so you would like to see them.
Use the tree command and save the output in a file if you have many directories:
tree -pufid /home/directory_to_check > /home/user/permissions.txt
taken from the answer here: https://unix.stackexchange.com/a/82374
You want to reset the root password for MySQL in your linux Ubuntu installation.
Follow the steps described https://linuxconfig.org/how-to-reset-root-mysql-password-on-ubuntu-18-04-bionic-beaver-linux
Problem
You would like to access a host set up with nginx after adding your own vhost configuration file in /etc/nginx/conf.d/myfile.smth, but you get Connection refused.
Solution
Make sure that your nginx configuration file has the .conf extension as /etc/nginx/conf.d/myfile.conf.
Problem
You would like to copy the contents of a source directory to a destination directory without overwriting existing files on the destination.
Solution
You can use
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rsync -a -v --ignore-existing source_dir/ dest_dir/ |
and you can also use the –dry-run option to test before running it.
Problem
You have defined a variable in a bash script (ie MY_FOLDER) but you also want to dynamically get the parent folder (ie MY_FOLDER can have multiple values).
Solution
Use the dirname as in the following
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MY_FOLDER=/home/user/first_folder/second_folder MY_PARENT_FOLDER=$(dirname $MY_FOLDER) echo $MY_FOLDER echo $MY_PARENT_FOLDER ....... /home/user/first_folder/second_folder /home/user/first_folder |