计划'；tclsh'；是否当前未安装？

我正在尝试在我的ubuntu16.04机器上安装tcl/tk8.4版本。完成apt get install命令后。如果我键入tclsh命令。我收到的错误消息是：程序“tclsh”当前未安装。您可以通过键入来安装它。sudoatp获得安装tcl

 The steps followed are as follows: 
 1. I have removed the latest tcl/tk8.6, using autoremove commands 
 2.dccom@dccom-vm:~$ sudo apt-get install tk8.4 tcl8.4
 [sudo] password for dccom:
 Reading package lists... Done
 Building dependency tree
 Reading state information... Done
 The following additional packages will be installed:
 libtk8.4
 Suggested packages:
 tcl-tclreadline
 The following NEW packages will be installed:
   libtk8.4 tcl8.4 tk8.4
 0 upgraded, 3 newly installed, 0 to remove and 350 not upgraded.
 Need to get 567 kB/581 kB of archives.
 After this operation, 1.858 kB of additional disk space will be used.
 Do you want to continue? [Y/n] Y
 Get:1 http://id.archive.ubuntu.com/ubuntu xenial/universe i386 libtk8.4 
 i386 8.4.20-8 [556 kB]
 Get:2 http://id.archive.ubuntu.com/ubuntu xenial/universe i386 tk8.4 i386 
 8.4.20-8 [11,5 kB]
 Fetched 567 kB in 1s (331 kB/s)
 Selecting previously unselected package libtk8.4:i386.
 (Reading database ... 276714 files and directories currently installed.)
 Preparing to unpack .../libtk8.4_8.4.20-8_i386.deb ...
 Unpacking libtk8.4:i386 (8.4.20-8) ...
 Selecting previously unselected package tcl8.4.
 Preparing to unpack .../tcl8.4_8.4.20-8_i386.deb ...
 Unpacking tcl8.4 (8.4.20-8) ...
 Selecting previously unselected package tk8.4.
 Preparing to unpack .../tk8.4_8.4.20-8_i386.deb ...
 Unpacking tk8.4 (8.4.20-8) ...
 Processing triggers for libc-bin (2.23-0ubuntu4) ...
 Processing triggers for man-db (2.7.5-1) ...
 Setting up libtk8.4:i386 (8.4.20-8) ...
 Setting up tcl8.4 (8.4.20-8) ...
 Setting up tk8.4 (8.4.20-8) ...
 Processing triggers for libc-bin (2.23-0ubuntu4) ...

 Error info:

 dccom@dccom-vm:~$ tclsh
 The program 'tclsh' is currently not installed. You can install it by 
 typing:
 sudo apt install tcl

---

我需要在这里设置任何环境变量吗？请建议

默认情况下，

tclsh

程序将以名称

tclsh8.4

安装；使用tclsh8.4中的

查找它的实际位置。这使得在一个系统上使用多个版本的Tcl变得更加容易。但是，如果要将其设为默认值，则应使用。尝试键入以下内容（在root提示符下或通过
sudo
）：

对于
wish
（默认情况下安装为
wish8.4
），您可能还需要类似的东西。
您为什么要降级到8.4？与其他语言不同，Tcl非常兼容。您可以在8.6上运行tcl 7.0程序，而不会出现任何问题。无论如何，最新版本的bash缓存将指向可执行文件的路径。通常您只需关闭终端并打开另一个终端即可解决此问题。@slebetman:是的，我必须安装spirent测试中心linux env，它支持tcl 8.4到8.5.14的较低版本。它在STC规范中提到。谢谢，我发现了这个问题。对于TCL4.8，我们需要在/usr/bin/中创建一些到tclsh的软链接。我错过了。。现在工作正常了。。
update-alternatives --config tclsh