By using braces we can provide whole word patterns. This removes the second item from the list, remember that we're counting from zero so the left most item is item zero. Type in pop D space plus one and hit enter. For instance if we wanted a CD to a directory we type in C D space tilde zero and hit enter. Type in echo space tilde one and hit enter. This allows us to bounce between any number of directories. The tilde hyphen expansion allows us to bounce between two directories. We have to supply a directory number starting from zero so type in echo space tilde zero and hit enter. Now, use tilde substitution to access them. We see that we have a couple of directories in the stack. Now, let's type in push D space slash var slash log and hit enter again. Type in push D space slash E T C slash yum dot repos dot d and hit enter. We can also expand to any directory in the list, we have to use the push D command to put directories in the list first. The tilde hyphen allows us to bounce between two directories very easily. Type in echo space tilde hyphen and hit enter. If we append a hyphen to the tilde it will expand to our previous directory. This is similar to the dot character but provided by the bash tilde substitution. Now, type in echo tilde plus and hit enter. Type in CD space slash var and hit enter. If we follow the tilde with a plus symbol it will expand to our current directory. Type in echo space tilde root and hit enter. We can also get it to expand out to other users home directories as well by specifying the user. If we type in echo space tilde and hit enter, it shows our home directory. It allows us to expand the path to include directories like the users home, the current directory, parent directory, or even the previous directory. The tilde is a meta character with special meaning. There is another way of expanding the path to include these directories and more using bash path substitution. The top two items are the dot and dot dot directories. We can see these by showing hidden files with LS. These short cuts are provided by the file system. In Chapter One of this course we talked about using dot and dot dot as short cuts to the current directory and the parent directory.

How to make tilde in linux