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If you are upgrading from an older version of Go you must first remove the existing version.
Download the archive and extract it into /usr/local
, creating a Go tree in /usr/local/go
. For example:
tar -C /usr/local -xzf go1.7.5.linux-amd64.tar.gz
(Typically these commands must be run as root or through sudo
.)
Add /usr/local/go/bin
to the PATH
environment variable. You can do this by adding this line to your /etc/profile
(for a system-wide installation) or $HOME/.profile
:
export PATH=$PATH:/usr/local/go/bin
The Go binary distributions assume they will be installed in /usr/local/go
(or c:\Go
under Windows), but it is possible to install the Go tools to a different location. In this case you must set the GOROOT
environment variable to point to the directory in which it was installed.
For example, if you installed Go to your home directory you should add the following commands to $HOME/.profile
:
export GOROOT=$HOME/go export PATH=$PATH:$GOROOT/bin
Note: GOROOT
must be set only when installing to a custom location.
Check that Go is installed correctly by setting up a workspace and building a simple program, as follows.
Create a directory to contain your workspace, $HOME/work
for example, and set the GOPATH
environment variable to point to that location.
$ export GOPATH=$HOME/work
You should put the above command in your shell startup script ($HOME/.profile
for example).
Next, make the directories src/github.com/user/hello
inside your workspace (if you use GitHub, substitute your user name for user
), and inside the hello
directory create a file named hello.go
with the following contents:
package main import "fmt" func main() { fmt.Printf("hello, world\n") }
Then compile it with the go
tool:
$ go install github.com/user/hello
The command above will put an executable command named hello
(or hello.exe
) inside the bin
directory of your workspace. Execute the command to see the greeting:
$ $GOPATH/bin/hellohello, world
If you see the "hello, world" message then your Go installation is working.
Before rushing off to write Go code please read the How to Write Go Code document, which describes some essential concepts about using the Go tools.
To remove an existing Go installation from your system delete the go
directory. This is usually /usr/local/go
under Linux, Mac OS X, and FreeBSD or c:\Go
under Windows.
You should also remove the Go bin
directory from your PATH
environment variable. Under Linux and FreeBSD you should edit /etc/profile
or $HOME/.profile
. If you installed Go with the Mac OS X package then you should remove the /etc/paths.d/go
file. Windows users should read the section about setting environment variables under Windows.
For real-time help, ask the helpful gophers in #go-nuts
on the Freenode IRC server.
The official mailing list for discussion of the Go language is Go Nuts.
Report bugs using the Go issue tracker.
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