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Top Forums Shell Programming and Scripting Puzzled with hexdump, hd and ln Post 302441238 by vistastar on Friday 30th of July 2010 01:38:27 AM
Old 07-30-2010
Puzzled with hexdump, hd and ln

How to create a symbolic link to a command with certain argument?

When I man hexdump, it is said in the man page that "-C Canonical hex+ASCII display...Calling the command hd implies this option". Actually it is. hd equals to hexdump -C.

And then I examined the ln command but find it is a symbolic link to hexdump, just like this: /usr/bin/hd -> hexdump.

But I failed to make such a symbolic link like this. I tried: ln -s "/bin/ls -al" myls. But it didn't work.

I wonder how to make a symbolic link to a command with certain argument.

Thanks.
 

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symlink(4)						     Kernel Interfaces Manual							symlink(4)

NAME
symlink - symbolic link DESCRIPTION
A symbolic (or soft ) link is a file whose name indirectly refers (points) to a relative or absolute path name. During path name interpretation, a symbolic link to a relative path name is expanded to the path name being interpreted, and a symbolic link to an absolute path name is replaced with the path name being interpreted. Thus, given the path name If is a symbolic link to a relative path name such as the path name is interpreted as If is a symbolic link to an absolute path name such as the path name is interpreted as All symbolic links are interpreted in this manner, with one exception: when the symbolic link is the last component of a path name, it is passed as a parameter to one of the system calls: or (see readlink(2), rename(2), symlink(2), unlink(2), chown(2) and lstat(2)). With these calls, the symbolic link, itself, is accessed or affected. Unlike normal (hard) links, a symbolic link can refer to any arbitrary path name and can span different logical devices (volumes). The path name can be that of any type of file (including a directory or another symbolic link), and may be invalid if no such path exists in the system. (It is possible to make symbolic links point to themselves or other symbolic links in such a way that they form a closed loop. The system detects this situation by limiting the number of symbolic links it traverses while translating a path name.) The mode and ownership of a symbolic link is ignored by the system, which means that affects the actual file, but not the file containing the symbolic link (see chmod(1)). Symbolic links can be created using or (see ln(1) and symlink(2)). AUTHOR
was developed by HP and the University of California, Berkeley. SEE ALSO
cp(1), symlink(2), readlink(2), link(2), stat(2), mknod(1M). symlink(4)
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