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If I need more info about |() what is it called?
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If I need more info about |() what is it called?

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what do you mean.<br />
| pipe means pass the data to the next application.<br />
in the case of () this means that the data is being passed to the group which as your example shows it runs commands prior to the application that actually gets the data.<br />
i.e. items in parenthesis are treated as a group.
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what do you mean.
| pipe means pass the data to the next application.
in the case of () this means that the data is being passed to the group which as your example shows it runs commands prior to the application that actually gets the data.
i.e. items in parenthesis are treated as a group.

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same as <br />
<br />
cp -R asm /u01/app/oracle/product/11<wbr />.1/
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same as

cp -R asm /u01/app/oracle/product/11.1/

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To slightly correct tangchunfeng, the cp will reflect the ownership of the copied files as those of the user running the copy while the tar | tar mechanism will maintain the original ownership/permissions.<br />
i.e. tar | tar process is a mirror copy.
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To slightly correct tangchunfeng, the cp will reflect the ownership of the copied files as those of the user running the copy while the tar | tar mechanism will maintain the original ownership/permissions.
i.e. tar | tar process is a mirror copy.

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<div class="content wysiwyg-content">
what does this command do?<br />
<br />
tar -cf - asm | (cd /u01/app/oracle/product/11<wbr />.1/;tar -xf - )
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what does this command do?

tar -cf - asm | (cd /u01/app/oracle/product/11.1/;tar -xf - )

oracle unix command

Oracle is an object-relational database management system. It supports a large number of languages and application development frameworks. Its primary languages are SQL, PL/SQL and Java, but it also includes support for C and C++. Oracle also has its own enterprise modules and application server software.

Oracle Database

Unix is a multitasking, multi-user computer operating system originally developed in 1969 at Bell Labs. Today, it is a modern OS with many commercial flavors and licensees, including FreeBSD, Hewlett-Packard’s UX, IBM AIX and Apple Mac OS-X. Apart from its command-line interface, most UNIX variations support the standardized X Window System for GUIs, with the exception of the Mac OS, which uses a proprietary system.