ubuntu16.04LTS中如何实现开机启动自动更换壁纸

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功能

功能的话，是从必应壁纸爬取最新的那张壁纸，然后本来因为我怕电脑又放了太多东西，就设置了个图片最大的数目，到达这个阈值就删除所有的图片= =|| 通过python的os模块，设置壁纸，

这里可以参考：how-to-change-desktop-background-from-command-line-in-unity , 还有就是考虑到刚开机时我不一定连得上网（辛酸 T_T)，所以设置了一个爬取的间隔

代码

# -*- coding: utf-8 -*-#!/usr/bin/python#!/bin/bash# ---------------------------------------------------------- ## This is a script which can change background automatically ## every time the system starts.        ## author: Huang Zhenyang          ## email: 745125931@qq.com         ## ---------------------------------------------------------- ## ----- Import ----- #import osimport reimport urllibimport timeimport socket# --- End Import --- #class Spider(object): """ This is the spider to get the img from being """ def __init__( self, img_matched_pattern_para, url_para, file_name_para ):  """  init function  :param img_matched_pattern_para: the pattern to match a img  :param url_para: url to crawler  :param file_name_para: file name  """  self.img_matched_pattern = img_matched_pattern_para  self.url = url_para  self.file_name = file_name_para def get_img(self):  """  download the image  :return:  """  html = self.get_html()  img_pos = re.search(self.img_matched_pattern, html)  img_page_href = self.url + img_pos.group()[6:-7] + "download"  urllib.urlretrieve(img_page_href, self.file_name) def get_html(self):  """  return the html  :return: page's html   """  page = urllib.urlopen(self.url)  html = page.read()  return htmlclass Controller(object): """ This is the controller to control the spider's parameters. """ def __init__(self, pattern_href_para, path_para, url_para, img_max_num_para):  """  :param pattern_href_para: href's match pattern  :param path_para: path to save images  :param url_para: url  :param img_max_num_para: max number that the  """  self.pattern_href = pattern_href_para  self.path = path_para  self.url = url_para  self.img_max_num = img_max_num_para  self.file_name = ""  self.init_file_name = "0.jpg"  self.file_extension_name = ".jpg" def judge(self):  """  judge if the number of images is grater than img_max_num.  if true, delete all of them and then run spider, else directly run spider.  Also, we should set the file name.  :return:  """  root = None  _dirs = None  files = None  for root, _dirs, files in os.walk(self.path, True):   pass  files_len = len(files)  if files_len == 10:   for i in range(0, 10):    os.remove(root + files[i])   self.file_name = self.path + self.init_file_name  else:   self.file_name = self.path + str(files_len) + self.file_extension_name def run_spider(self):  """  run spider.  TODO: This function needs to be modified in the future which makes these two class coupling too much.  :return:  """  # In case user's computer hasn't connect the internet.  for i in range(0, 60):   try:    spider = Spider(self.pattern_href, self.url, self.file_name)    spider.get_img()    break   except IOError as e:    print "Connection error: %s" % e    time.sleep(60)    continue   except Exception as e:    print "Connection error: %s" % e    time.sleep(60)    continue  c_path = '"file://' + self.file_name + '"' # absolute path  # call system command to change the gnome background  os.system('gsettings set org.gnome.desktop.background picture-uri ' + c_path)  print "gsettings set org.gnome.desktop.background picture-uri " + c_pathif __name__ == '__main__': pattern_href = r'href="/photo/.*?" rel="external nofollow" ' path = '/home/hzy/图片/backgrounds/' url = 'https://bing.ioliu.cn/' img_max_num = 10 controller = Controller(pattern_href, path, url, img_max_num) controller.judge() controller.run_spider()

开机自启动

在/home/hzy/.config/autostart中，新建一个xxx.desktop的文件，内容如下：

[Desktop Entry]Name=autoChangeBackgroundImgComment=Python ProgramExec=python /home/hzy/Script/autoChangeBackgroundImg/autoChangeBackgroundImg.pyIcon=/home/hzy/Script/autoChangeBackgroundImg/autoChangeBackgroundImg.pngTerminal=falseMultipleArgs=falseType=ApplicationCategories=Application;Development;StartupNotify=true

说明：

1. Exec 后面的路径就是该脚本的路径

2. Icon的话可以自己随便找个图片，设置成该路径即可

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