기본사용쉘(로그인쉘)과 현재 사용중인 쉘에 대한 오해

[bible@sulinux ~]$ echo $SHELL

/bin/bash

[bible@sulinux ~]$

[bible@sulinux bible]$ echo $SHELL                             (현재 사용중인 쉘확인)
/bin/bash
[bible@host1 bible]$
[bible@host1 bible]$ /bin/csh                       (현재 사용할 쉘은 C쉘로 변경)
[bible@host1 ~]$
[bible@host1 ~]$
[bible@host1 ~]$ /bin/sh                        (현재 사용할 쉘을 Born 쉘로 변경)
sh-2.05b$
sh-2.05b$
sh-2.05b$ exit                             (사용중인 쉘에서 빠져나옴, Born 쉘에서
                                            빠져나옴, 빠져나온 다음은 C쉘상태임)
exit
[bible@host1 ~]$ exit                     (사용중인 쉘에서 빠져나옴, C 쉘상태에서
                                          빠져나옴, 빠져나온 다음은 Bash쉘 상태임)
exit
[bible@sulinux bible]$

[root@sulinux root]# id
uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel)
[root@sulinux root]#
[root@sulinux root]# chsh bible
Changing shell for bible.
New shell [/bin/bash]: /bin/csh
Shell changed.
[root@sulinux root]#
[root@sulinux root]# chsh bible2
Changing shell for bible2.
New shell [/bin/bash]: /bin/sh
Shell changed.
[root@sulinux root]#

bible:x:500:500:SungSoo:/home/bible:/bin/bash

bible:x:500:500:SungSoo:/home/bible:/bin/csh