Differences between shell environment variables and set, env, export

One .shell Classification of environmental variables and set env export The difference between :

set: Show ( Set up )shell Variable Including private variables and user variables , Different kinds of shell There are different private variables bash,ksh,csh Every middle shell Private variables are different

env: Show ( Set up ) User variables

export: Show ( Set up ) Currently exported as a user variable shell Variable .

Reference resources ：shell Environment variables and set,env,export The difference between

Tried for two nights , Go a lot of detours , Waste a lot of time ,
Got some rules , Post it for later reference .
In fact, sometimes it's not the tool script that's wrong , It's not that my steps are wrong ,
But some information has not been obtained , There are some mistakes without feedback, and I don't know why I'm wrong .

My environment is win7 Installed a VM Of Centos7.

cadense 13.20
##INCISEVE

1) patch

Follow the... In the folder readme, perform ./cadence_patch.sh /eda_soft/cadence/EDI131
Be careful to use administrator privileges sudo/su -

2) license gen

Directly in windows Just execute it under . Double-click on the run xxx.bat Wait a minute or two to generate xxx.dat file ( Before, I doubted whether it must be in linux perform ,linux There are various problems in implementation , No authority /wine Wait, wait, wait , alas ...)

For the convenience of storage, it is generally recommended to put < Install the complete directory >/INCISIV132/share/license below ,
This folder is read-only , So we need to sudo Copy it ,

The problem is coming. , The default attribute of copying is ”-rwxr-x—”, At this time, the execution of simulation will definitely get a pile “*F,NOLICN”,( History of blood and tears , You think it's license Not cracked yes )
direct chmod 777 xxx.dat Modify file properties , After modification “-rwxrwxrwx”

3) Set the environment variable

1.path

setenv INCISIV_HOME /cadtools/cadence/INCISIV132
set path = ($path ${INCISIV_HOME}/tools/bin)

2.license

I don't know why I only set CDS_LIC_FILE useless ,
set CDS_LIC_FILE = /cadtools/cadence/INCISIV132/share/license/license.dat （<---- useless , No settings ）
Or is it useless? I can't find it license,
Try setting only LM_LICENSE_FILE, solve .
setenv LM_LICENSE_FILE /cadtools/cadence/INCISIV132/share/license/license.dat

Reference resources ：LICENSE Notes on cracking – Some details that must be paid attention to

In csh/tcsh:
setenv CDS_LIC_FILE …