Echo - Decodificación y Operaciones

Decoding using Kali

• Decode Base64 Encoded Values

echo -n "QWxhZGRpbjpvcGVuIHNlc2FtZQ==" | base64 --decode

• Decode Hexidecimal Encoded Values

echo -n "46 4c 34 36 5f 33 3a 32 396472796 63637756 8656874" | xxd -r -ps

• ROT13 file content

cat <file_name> | tr '[A-Za-z]' '[N-ZA-Mn-za-m]'

Using Echo For Maths

echo $((5+7)) -------------Add 5+712
echo $(($((5+2)) *3 )) -----Add 5+7 * 7 21

using Echo

echo imran
echo "imran"
echo * 
echo D*
echo *D
echo [:upper:](/blog/upper)* --------Show Everthing That starts with Upper Case.
echo *[:lower:](/blog/lower) --------Show Everything That ends with Lowercase.
echo /usr/*      ----------Show Availabe paths
echo .*          ----------Show all Hidden Files
ls -d .[!.]*     ----------Show All Hidden Files in Presentable Way.
echo ~           ----------Show You Current User name
echo ~root	------------Show Current Usernames HomeDir