Tilde and Brace usage in UNIX

 [test scott]$ pwd
/u04/ftp/orcl/scott
[test scott]$ cd ..
[test orcl]$ echo ~-
/u04/ftp/orcl/scott
[test orcl]$ pwd
/u04/ftp/orcl
[test orcl]$ touch {apple,grape,banana}
[test orcl]$ ls
apple  banana  grape  scott/
[test orcl]$ ls -l
total 2
-rw-rw-r--  1 apps apps  0 Nov  4 06:21 apple
-rw-rw-r--  1 apps apps  0 Nov  4 06:21 banana
-rw-rw-r--  1 apps apps  0 Nov  4 06:21 grape
drwxrwxrwx 13 apps root  14 Nov  3 10:56 scott/
[test orcl]$ touch file_{1..6}
[test orcl]$ ls -l
total 2
-rw-rw-r--  1 apps apps  0 Nov  4 06:21 apple
-rw-rw-r--  1 apps apps  0 Nov  4 06:21 banana
-rw-rw-r--  1 apps apps  0 Nov  4 06:22 file_1
-rw-rw-r--  1 apps apps  0 Nov  4 06:22 file_2
-rw-rw-r--  1 apps apps  0 Nov  4 06:22 file_3
-rw-rw-r--  1 apps apps  0 Nov  4 06:22 file_4
-rw-rw-r--  1 apps apps  0 Nov  4 06:22 file_5
-rw-rw-r--  1 apps apps  0 Nov  4 06:22 file_6
-rw-rw-r--  1 apps apps  0 Nov  4 06:21 grape
drwxrwxrwx 13 apps root  14 Nov  3 10:56 scott/
[test orcl]$ ls -l
total 2
drwxrwxrwx 13 apps root 14 Nov  3 10:56 scott/
[test orcl]$ ls -l
total 2
drwxrwxrwx 13 apps root 14 Nov  3 10:56 scott/
[test orcl]$ ls
scott/
[test orcl]$ pwd
/u04/ftp/orcl
You have mail in /var/spool/mail/apps
[test orcl]$ cd scott
[test scott]$
[test scott]$
[test scott]$ clear
[test scott]$ pwd
/u04/ftp/orcl/scott
[test scott]$ cd ..
[test orcl]$ echo ~-
/u04/ftp/orcl/scott
[test orcl]$ pwd
/u04/ftp/orcl
[test orcl]$ ls
scott/
[test orcl]$ ls -l
total 2
drwxrwxrwx 13 apps root 14 Nov  3 10:56 scott/
[test orcl]$ touch {apple banana cherry}
[test orcl]$ ls -l
total 2
-rw-rw-r--  1 apps apps  0 Nov  4 06:31 {apple
-rw-rw-r--  1 apps apps  0 Nov  4 06:31 banana
-rw-rw-r--  1 apps apps  0 Nov  4 06:31 cherry}
drwxrwxrwx 13 apps root  14 Nov  3 10:56 scott/
[test orcl]$ toych file_{1..5}
-bash: toych: command not found
[test orcl]$ ls -l
total 2
-rw-rw-r--  1 apps apps  0 Nov  4 06:31 {apple
-rw-rw-r--  1 apps apps  0 Nov  4 06:31 banana
-rw-rw-r--  1 apps apps  0 Nov  4 06:31 cherry}
drwxrwxrwx 13 apps root  14 Nov  3 10:56 scott/
[test orcl]$ echo {1..10..2}
1 3 5 7 9
[test orcl]$ echo {1..10..3}
1 4 7 10
[test orcl]$ echo {A..Z}
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
[test orcl]$ echo {a..z}
a b c d e f g h i j k l m n o p q r s t u v w x y z
[test orcl]$ echo {0..9}
0 1 2 3 4 5 6 7 8 9
[test orcl]$ echo {0..21}
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
[test orcl]$ echo {a..Z}
a ` _ ^ ]  [ Z
[test orcl]$ echo {m..a..2}
m k i g e c a
[test orcl]$ touch {apple,banana}_{0..2}{a..b}
You have mail in /var/spool/mail/apps
[test orcl]$ ls
apple_0a  apple_0b  apple_1a  apple_1b  apple_2a  apple_2b  banana_0a  banana_0b  banana_1a  banana_1b  banana_2a  banana_2b  scott/
[test orcl]$