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The Tuesday 2008-01-08 at 06:35 -0700, Bill Anderson wrote:
Bill Anderson wrote:
Bourne shell compatibility. You might also note that under Linux > > it is /usr/bin/sh, /usr/bin/ksh, and /bin/bash.
No, not really:
cer@nimrodel:~> l /bin/sh /usr/bin/sh lrwxrwxrwx 1 root root 4 2007-11-03 02:13 /bin/sh -> bash* lrwxrwxrwx 1 root root 9 2007-11-03 02:13 /usr/bin/sh -> /bin/bash*
cer@nimrodel:~> l /bin/ksh /usr/bin/ksh lrwxrwxrwx 1 root root 16 2007-11-03 16:07 /bin/ksh -> /lib/ast/bin/ksh* lrwxrwxrwx 1 root root 16 2007-11-03 16:07 /usr/bin/ksh -> /lib/ast/bin/ksh*
cer@nimrodel:~> l /bin/bash /usr/bin/bash ls: cannot access /usr/bin/bash: No such file or directory - -rwxr-xr-x 1 root root 604040 2007-09-22 00:16 /bin/bash*
My original comment about /bin being linked to /usr/bin applied only to Solaris, AIX, and HPUX. Yet, all the examples of why I am wrong are from Linux. If you were on a Unix system, there would not be a /lib/ast/ksh, as KornShell is in /usr/bin. The other difference you will notice is that AIX now has bsh for Bourne Shell. Those who use Unix also notice the emphasis on hard links in Unix versus symbolic links in Linux.
You said:
]>>>> Bourne shell compatibility. You might also note that under Linux ]>>>> it is /usr/bin/sh, /usr/bin/ksh, and /bin/bash.
Notice you speak in this paragraph about Linux, and that's the one I was comenting about. I just used the results of the which command. Although, I prefer the whence command of ksh.
Also, notice that symbolic links are needed to cross partitions: that's why they are preferred sometimes (specially for files in /usr) I know. You forget that I have been in this game for awhile. I remember when symbolic links were added to Unix. In Version 7 Unix, circa 1978,
Carlos E. R. wrote: there were no symbolic links.
- -- Cheers, Carlos E. R.
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