8.5 重定向标准输出和标准错误 ............................................................................................................................. 95
8.6 重定向到空设备 ................................................................................................................................................. 96
8.7 read 命令 ............................................................................................................................................................ 96
第九章 Shell 信号发送与捕捉 ............................................................... 98
9.1 Linux 信号类型 .................................................................................................................................................. 98
9.2 kill 命令 .......................................................................................................................................................... 100
9.3 trap 命令 .......................................................................................................................................................... 100
第十章 Shell 编程时常用的系统文件 ........................................................ 102
10.1 Linux 系统目录结构 ...................................................................................................................................... 102
10.2 环境变量文件 ................................................................................................................................................. 102
10.3 系统配置文件 ................................................................................................................................................. 103
10.4 /dev 目录 ........................................................................................................................................................ 104
10.5 /proc 目录 ...................................................................................................................................................... 104
10.5.1 /proc ....................................................................................................................................................... 104
10.5.2 /proc/net ............................................................................................................................................... 105
10.5.3 /proc/sys ............................................................................................................................................... 105
第十一章 Shell 常用命令与工具 ............................................................ 108
11.1 ls..................................................................................................................................................................... 108
11.2 echo................................................................................................................................................................. 108
11.3 printf ............................................................................................................................................................. 109
11.4 cat................................................................................................................................................................... 110
11.5 tac................................................................................................................................................................... 110
11.6 rev................................................................................................................................................................... 111
11.7 wc..................................................................................................................................................................... 111
11.8 cp..................................................................................................................................................................... 111
11.9 mkdir ............................................................................................................................................................... 112
11.10 mv................................................................................................................................................................... 112
11.11 rename ........................................................................................................................................................... 112
11.12 dirname ......................................................................................................................................................... 112
11.13 basename ....................................................................................................................................................... 113
11.14 du................................................................................................................................................................... 113
11.15 cut................................................................................................................................................................. 114
11.16 tr................................................................................................................................................................... 114
11.17 stat ............................................................................................................................................................... 115
11.18 seq................................................................................................................................................................. 115
