小编Fah*_*eri的帖子

.postheader {
  display: flex;
  justify-content: space-between;
}

.postheader .postavatar img {
  width: 90px;
}

.postheader .userinfo {
  margin-top: 10px;
  margin-left: 20px;
}

.postheader .userinfo .postusername {
  color: #b3b3b3;
}

.postheader .posttime {
  color: #b3b3b3;
}

<div class="postheader">
  <div class="postavatar"><img src="images/avatar01.png" alt="User Image"></div>
  <div class="userinfo">
    <div class="postfullname">Fahad Aldaferi</div>
    <div class="postusername">@Q8Xbox</div>
  </div>
  <div class="posttime">24 m</div>
</div>