1) 
- sayebabu
- uid=622023(sayebabu) gid=622(senart22) groups=622(senart22)
- Linux
- /export/home/senart22/sayebabu
- DEV1.1	Desktop  SCR1.1
- total 12
drwxr-xr-x 3 sayebabu senart22 4096 Sep  7 16:20 DEV1.1
drwxr-xr-x 2 sayebabu senart22 4096 Sep  7 15:51 Desktop
drwxr-xr-x 2 sayebabu senart22 4096 Sep  8 13:12 SCR1.1
-
 .	       .dbus			  .vboxclient-display.pid
..	       .emacs.d			  .vboxclient-draganddrop.pid
.ICEauthority  .esd_auth		  .vboxclient-seamless.pid
.Xauthority    .gnupg			  DEV1.1
.bash_history  .local			  Desktop
.cache	       .ssh			  SCR1.1
.config        .vboxclient-clipboard.pid

- 
drwx------ 12 sayebabu senart22 4096 Sep  8 13:12 .
drwxr-xr-x 27 root     senart22 4096 Sep  1 16:13 ..
-rw-------  1 sayebabu senart22  656 Sep  8 13:11 .ICEauthority
-rw-------  1 sayebabu senart22   54 Sep  8 13:11 .Xauthority
-rw-------  1 sayebabu senart22 4909 Sep  8 13:04 .bash_history
drwxr-xr-x  3 sayebabu senart22 4096 Sep  7 15:51 .cache
drwxr-xr-x  8 sayebabu senart22 4096 Sep  7 16:27 .config
drwx------  3 sayebabu senart22 4096 Sep  7 15:51 .dbus
drwx------  2 sayebabu senart22 4096 Sep  7 16:24 .emacs.d
-rw-------  1 sayebabu senart22   16 Sep  7 15:51 .esd_auth
drwx------  3 sayebabu senart22 4096 Sep  7 15:51 .gnupg
drwxr-xr-x  3 sayebabu senart22 4096 Sep  7 15:51 .local
drwx------  2 sayebabu senart22 4096 Sep  7 15:54 .ssh
-rw-r-----  1 sayebabu senart22    5 Sep  7 15:52 .vboxclient-clipboard.pid
-rw-r-----  1 sayebabu senart22    5 Sep  7 15:51 .vboxclient-display.pid
-rw-r-----  1 sayebabu senart22    5 Sep  7 15:52 .vboxclient-draganddrop.pid
-rw-r-----  1 sayebabu senart22    5 Sep  7 15:52 .vboxclient-seamless.pid
drwxr-xr-x  3 sayebabu senart22 4096 Sep  7 16:20 DEV1.1
drwxr-xr-x  2 sayebabu senart22 4096 Sep  7 15:51 Desktop
drwxr-xr-x  2 sayebabu senart22 4096 Sep  8 13:12 SCR1.1

- 
       -a, --all
              do not ignore entries starting with .
       -l     use a long listing format
DESCRIPTION
       List  information  about  the FILEs (the current directory by default).
       Sort entries alphabetically if none of -cftuvSUX nor --sort  is  speci-
       fied.

       Mandatory  arguments  to  long  options are mandatory for short options
       too.

2)
- /export/home/senart22/sayebabu

4)
/bin:/usr/bin:/usr/local/bin:/usr/local/sbin:/opt/android-sdk/platform-tools:/opt/android-sdk/tools:/opt/android-sdk/tools/bin:/usr/lib/jvm/default/bin:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl

- bash: ./fi21: No such file or directory
- bash: ./SCR/TP1/BB/DIR2/fi21: Permission denied

- bash: fi21: command not found
- bash: ./fi21: Permission denied