Shell Programming and Scripting

ls -l /root/Documents/test

bash -xv script_name

sudo bash -xv script
#!/bin/bash
IAm=${0##*/}	# Save last component of script name for diagnostics
+ IAm=script

var_dir="/root/Documents/test"
+ var_dir=/root/Documents/test
cd "$var_dir" || exit 1	# Exit if we can't get into our target directory
+ cd /root/Documents/test

# Prompt for, get, and verify ZIP filename...
printf 'Enter name of file to be unzipped (with or without .zip extension): '
+ printf 'Enter name of file to be unzipped (with or without .zip extension): '
Enter name of file to be unzipped (with or without .zip extension): read var_name 
+ read var_name
example
var_base=${var_name%.zip}
+ var_base=example
if [ ! -r "$var_base".zip ]
then	printf '%s: %s not found or not readable.' "$IAm" "$var_base".zip >&2
	exit 2
fi
+ '[' '!' -r example.zip ']'
+ printf '%s: %s not found or not readable.'script example.zip
script: example.zip not found or not readable.+ exit 2

#!/bin/bash
IAm=${0##*/}	# Save last component of script name for diagnostics

var_dir="/root/Documents/test"
if [ -d "$var_dir" ]	# Exit if target directory does not exist.
then	printf '%s: Directory %s not found.' "$IAm" "$var_dir" >&2
	exit 1
fi

# Prompt for, get, and verify ZIP filename...
printf 'Enter name of file to be unzipped (with or without .zip extension): '
read var_name 
var_base=${var_name%.zip}
if [ ! -r "$var_base".zip ]
then	printf '%s: %s not found or not readable.' "$IAm" "$var_base".zip >&2
	exit 2
fi

# Unzip the named file into the target directory and move the file extracted
# from that archive with the extension ".c" in place of ".zip" for the archive
# to have the extension ".d" instead of ".c".
unzip -o "$var_base".zip -d "$var_dir" || exit 3
cd "$var_dir" || exit 4	# Exit if we can't get into our target directory
mv "$var_base".c "$var_base".d || exit 5

# Update the configfile.
ed -s configfile.txt <<-"EOF" || exit 6
	g/#SOMETHING="none"/s//SOMETHING="none"/
	w
	1,$p
	q
EOF

# Restart...
service something restart