Documents/playground
❯ cd .. # 切换到上一级目录
t7ex/Documents
❯ ls # 列出当前目录的内容
playground
t7ex/Documents
❯ cd playground # 进入 playground 目录
Documents/playground
❯ mkdir my_dir # 创建一个名为 my_dir 的新目录
Documents/playground
❯ touch myfile1.txt # 创建一个名为 myfile1.txt 的新文件
Documents/playground
❯ ls # 再次列出当前目录的内容
my_dir myfile1.txt
Documents/playground
❯ mv myfile1.txt my_dir/myfile2.txt # 将 myfile1.txt 移动到 my_dir 目录并重命名为 myfile2.txt
Documents/playground
❯ ls my_dir # 列出 my_dir 目录的内容，确认文件已经移动
myfile2.txt
Documents/playground
❯ cp my_dir/myfile2.txt my_dir/myfile3.txt # 复制 myfile2.txt 到 my_dir 目录并命名为 myfile3.txt
Documents/playground
❯ ls my_dir # 再次列出 my_dir 目录的内容，确认文件已经复制
myfile2.txt myfile3.txt
Documents/playground
❯ rm my_dir/myfile2.txt # 删除 my_dir 目录中的 myfile2.txt
Documents/playground
❯ ls my_dir # 再次列出 my_dir 目录的内容，确认文件已经删除
myfile3.txt
Documents/playground
❯ echo "Hello, World!" > greeting.txt # 将文本 "Hello, World!" 写入 greeting.txt 文件中
Documents/playground
❯ cat greeting.txt # 显示 greeting.txt 文件的内容
Hello, World!
Documents/playground
❯ echo "line2" >> greeting.txt
Documents/playground
echo "line2" >> greeting.txt
❯ cat greeting.txt
Hello,world
line2
Documents/playground
❯ grep "Hello" greeting.txt # 在 greeting.txt 文件中搜索包含 "Hello" 的行
Hello, World!
Documents/playground
❯ chmod 755 greeting.txt # 修改 greeting.txt 文件的权限为 755
Documents/playground
❯ sudo ps aux # 显示所有正在运行的进程，需要管理员权限
Documents/playground
❯ history # 显示先前执行的命令列表
1 cd ..
2 ls
3 cd playground
4 mkdir my_dir
5 touch myfile1.txt
6 ls
7 mv myfile1.txt my_dir/myfile2.txt
8 ls my_dir
9 cp my_dir/myfile2.txt my_dir/myfile3.txt
10 ls my_dir
11 rm my_dir/myfile2.txt
12 ls my_dir
13 echo "Hello, World!" > greeting.txt
14 cat greeting.txt
15 grep "Hello" greeting.txt
16 chmod 755 greeting.txt
17 sudo ps aux
18 history
