1.9 KiB
custom-ls
Instructions
Create the script custom-ls.sh which will create an alias custom-ls.
The alias custom-ls:
- shows the file details in long list format.
- does not list group information.
- does not ignore entries starting with
.. - prints the allocated size of each file, in blocks.
- sorts by file size, largest first.
Expected behavior:
$ custom-ls
error: command not found: custom-ls
$ ./custom-ls.sh
$ custom-ls .
total ...
7784 -rw-r--r-- 1 <user> 3983261 Dec 17 22:02 .file1 # just an example
3064 -rw-r--r-- 1 <user> 1566444 Dec 17 22:12 file2 # just an example
$
Hints
An alias is a shortcut that references a command. An alias replaces a string that invokes a command in the Linux shell with another user-defined string.
alias command instructs the shell to replace one string with another string while executing the commands.
$ alias testcmd="echo 01school"
$ testcmd
01school
$ alias
testcmd='echo 01school'
<...>
$
However, this update alias gets removed after closing the working environment.
To create and add aliases permanently to your bash shell on Linux and Unix-like systems:
1- Edit the ~/.bashrc:
vi ~/.bashrc
# or #
nano ~/.bashrc
2- Append your bash alias, For example append:
alias testcmd="echo 01school"
3- Save and close the file. 4- Activate alias
source ~/.bashrc
unalias unalias removes each alias name from the current shell execution environment.
$ alias
testcmd='echo 01school'
<...>
$ unalias testcmd
$ alias
<...>
$
You have to use Man or Google to know more about commands flags, in order to solve this exercise! Google and Man will be your friends!