If with Files
Suppose we want to check that file is a regular file or directory, the file have read, write or execute permission then again we have use test command or ([[ or [) with if condition.
here is an example.
#!/bin/bash
file_full_path="/home/kali/abc.txt"
# check file is a directory.
if [[ -d $file_full_path ]]
then
echo "${file_full_path} is a dir"
fi
# -b means file is block device.
if [[ -b $file_full_path ]]
then
echo "${file_full_path} is a block device"
fi
#check, file is a char device.
if [[ -c $file_full_path ]]
then
echo "${file_full_path} is a char device"
fi
#check, file exists.
if [[ -e $file_full_path ]]
then
echo "${file_full_path} is a exist device"
fi
#check, file have read permission.
if [[ -r $file_full_path ]]
then
echo "${file_full_path} have read permission"
fi
# check, file have write permission
if [[ -w $file_full_path ]]
then
echo "${file_full_path} have write permission"
fi
# check file have execute permission.
if [[ -x $file_full_path ]]
then
echo "${file_full_path} have execute permission"
fi