Magento 1.9.4.1 to 1.9.4.3 Version Upgrade Commands.
follow command.
1) First Go to Disable Cache & Compiler using Command.
-> Go to Shell Folder and run the command
Command --> php -f compiler.php clear
Command --> php -f compiler.php disable
2) touch maintenance.flag
3) rm -rf var/cache/ var/session/
4) php -f shell/compiler.php -- state && php -f shell/compiler.php -- disable
5) chmod -R 777 .
6) chmod 550 ./mage
7) ./mage mage-setup .
After this command, if you getting error Like "channel communication already exists" then run below command
8) ./mage channel-delete community
9) ./mage config-set preferred_state stable
10) ./mage sync
11) ./mage install https://connect20.magentocommerce.com/community Mage_All_Latest --force
12) ./mage list-installed
13) ./mage list-upgrades
14) php shell/indexer.php reindexall
15) rm -rf downloader/.cache/ var/cache/
16) rm -rf var/cache/ var/session/
17) php -f shell/compiler.php -- enable
18) chmod -R 777 var media
19) chmod 550 ./mage
20) rm -f maintenance.flag