No. A linesman can tell a referee what they saw and advise the referee about what to do, but only the referee can actually give the yellow card.
The referee can warn a player in two ways: a verbal warning, or a yellow card.
whistle, red and yellow cards and clothes
It usually is called a penalty and is showed by a yellow flag.
In most cases play continues. If it was done on intentionally, it depends on the referee but sometimes a yellow maybe even a red card.
A caution, by showing a yellow card, or a send off, by showing a red card.
sometimes a card and sometimes they wll just speak to the player
A booking is when you are written into the referee's book. It's a another word for receiving a card. (Usually a yellow card.)
if it denies a goalscoring opputunity a red, if not yellow and final warning
Yellow as a warning, red to be sent off.
If the referee deems it to be delaying the restart of play or unsporting behavior.