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Top Forums Shell Programming and Scripting How do display a warning message? Post 302407221 by dunkar70 on Wednesday 24th of March 2010 09:40:06 PM
Old 03-24-2010
First, UNIX is case sensitive so the command is cd, not CD. You can type "man cd" to get the manual page for the command. Second, the decision to include a slash in your path is important. Starting a path with it denotes the root as the starting point and it denotes a full path. Ending the path with it denotes a directory, which is assumed when using the cd command. Trying to use the cd command with a file generate an error.

In short, cd can use relative paths or full paths.

Starting from the directory you listed:
Code:
/home/me/blah

you can type either of two commands to get to the "me" directory:
- Full path is always available regardless of the current working directory:
Code:
cd /home/me

- Relative path is only available if the current directory is the immediate child of the /home/me directory:
Code:
cd ../me

Both forms of the command have advantages and disadvantages. The decision to use one over the other depends on 1) if you know the full path, 2) if the script must be portable within a set of files and directories, and 3) if it makes sense.

Error/warning messages will automatically be displayed if you 1) try to cd into a file or 2) into a directory that does not exist.

Last edited by dunkar70; 03-24-2010 at 10:42 PM.. Reason: Adding clarity
 

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GO-PACKAGES(7)						 Miscellaneous Information Manual					    GO-PACKAGES(7)

NAME
go - tool for managing Go source code DESCRIPTION
Many commands apply to a set of packages: go action [packages] Usually, [packages] is a list of import paths. An import path that is a rooted path or that begins with a . or .. element is interpreted as a file system path and denotes the package in that directory. Otherwise, the import path P denotes the package found in the directory DIR/src/P for some DIR listed in the GOPATH environment variable (see 'go help gopath'). If no import paths are given, the action applies to the package in the current directory. The special import path "all" expands to all package directories found in all the GOPATH trees. For example, 'go list all' lists all the packages on the local system. The special import path "std" is like all but expands to just the packages in the standard Go library. An import path is a pattern if it includes one or more "..." wildcards, each of which can match any string, including the empty string and strings containing slashes. Such a pattern expands to all package directories found in the GOPATH trees with names matching the patterns. As a special case, x/... matches x as well as x's subdirectories. For example, net/... expands to net and packages in its subdirectories. An import path can also name a package to be downloaded from a remote repository. Run 'go help remote' for details. Every package in a program must have a unique import path. By convention, this is arranged by starting each path with a unique prefix that belongs to you. For example, paths used internally at Google all begin with 'google', and paths denoting remote repositories begin with the path to the code, such as 'code.google.com/p/project'. As a special case, if the package list is a list of .go files from a single directory, the command is applied to a single synthesized pack- age made up of exactly those files, ignoring any build constraints in those files and ignoring any other files in the directory. AUTHOR
This manual page was written by Michael Stapelberg <stapelberg@debian.org>, for the Debian project (and may be used by others). 2012-05-13 GO-PACKAGES(7)
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