Upgrading Moodle to Newer Versions

[root@vps training]# history | tail -20
1031 git pull
1032 php admin/cli/upgrade.php
1033 php admin/cli/maintenance.php –disable
1034 git branch -a
1035 git branch –track MOODLE_500_STABLE origin/MOODLE_500_STABLE
1036 git checkout MOODLE_500_STABLE
1037 git commit
1038 git checkout MOODLE_500_STABLE
1039 php admin/cli/maintenance.php –enable
1040 remotes/origin/MOODLE_400_STABLE
1041 git commit MOODLE_400_STABLE
1042 git branch –track MOODLE_400_STABLE origin/MOODLE_400_STABLE
1043 history -10
1044 history | tail -10
1045 git checkout MOODLE_400_STABLE
1046 php admin/cli/maintenance.php –enable
1047 git pull
1048 php admin/cli/upgrade.php
1049 php admin/cli/maintenance.php –disable
1050 history | tail -20
[root@vps training]# history | tail -25
1027 git pull
1028 php admin/cli/cron.php
1029 vi config.php
1030 php admin/cli/maintenance.php –enable
1031 git pull
1032 php admin/cli/upgrade.php
1033 php admin/cli/maintenance.php –disable
1034 git branch -a
1035 git branch –track MOODLE_500_STABLE origin/MOODLE_500_STABLE
1036 git checkout MOODLE_500_STABLE
1037 git commit
1038 git checkout MOODLE_500_STABLE
1039 php admin/cli/maintenance.php –enable
1040 remotes/origin/MOODLE_400_STABLE
1041 git commit MOODLE_400_STABLE
1042 git branch –track MOODLE_400_STABLE origin/MOODLE_400_STABLE
1043 history -10
1044 history | tail -10
1045 git checkout MOODLE_400_STABLE
1046 php admin/cli/maintenance.php –enable
1047 git pull
1048 php admin/cli/upgrade.php
1049 php admin/cli/maintenance.php –disable
1050 history | tail -20
1051 history | tail -25