django show id and time in admin code example

Example 1: get current logged in user id in apex

UserInfo.getUserId()

Example 2: docker command to login with user name and pass word

$ cat ~/my_password.txt | docker login --username foo --password-stdin

Example 3: how to create a user and add it to a group in linux

useradd -G examplegroup exampleusername

Example 4: show post id on django admin interface

class BookAdmin(admin.ModelAdmin):
    readonly_fields = ('id',)

admin.site.register(Book, BookAdmin)