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- positional-parameters
- e.g. ''shift 4'' shifts ''$5'' to ''$1''. ===== Using them ===== Enough theory, you want to access you... n code a [[syntax:ccmd:c_for | C-style for-loop]] using ''$#'' as the end value. On every iteration, the ... and checks if ''$1'' still expands to something, using the [[commands:classictest | test command]]: <co... n as long as ''$1'' is defined (but may be null), using [[syntax:pe#use_an_alternate_value | parameter ex
- obsolete
- n and should never be used, and the explicit form using separate redirections is preferred over both. The... n the Korn and POSIX style function definitions - using both the ''function'' keyword and parentheses. It... modern shell (and then some). The only reason for using backticks is for compatibility with a real Bourne... rors, it's better to test for undefined variables using one of [[http://mywiki.wooledge.org/BashFAQ/083 |
- quoting
- recognized types: * **per-character escaping** using a backslash: ''\$stuff'' * **weak quoting** wit... '$'') can be masked to not have a special meaning using the backslash: <code> echo \$HOME is set to \"$H
- redirection
- </code> A here-document is an input redirection using source data specified directly at the command lin... ght be useful to have optical nice code also when using here-documents. The tag you use **must** be the