MacOS Shell Programming Notes

2. MacOS does not support ll (need to use LS-L implementation), in fact ll under Linux is ls-l shortcut keys.

LS Displays the file in the current directory.

LS-L Displays the file details in the current directory.

#以下命令均不包含 ".", "..." Directories, and the "." The beginning of the hidden file, if required, ll need to add the-a parameter # number of files in the current directory, do not include subdirectories ll |grep "^-" |wc-l# the current directory number, do not include subdirectories ll |grep "^d" |wc-l# the current directory number of files, including subdirectories ll-r| grep "^-" |wc-l# the number of directories under the current directory, including subdirectories Ll-r|grep "^d" |wc-l

1. Traversing the Directory

#!/bin/bashfunction Getdir () {for    element in ' ls $ '    do          dir_or_file=$1 "/" $element        if [-D $dir _or_file ]        then             getdir $dir _or_file        else            echo $dir _or_file        fi      done}root_dir= "/home/test" Getdir $ Root_dir

MacOS Shell Programming Notes