# cat > operating_system UnixLinuxWindowsMacOS

当你输入cat > operatingsystem，禁止读取iis信息 、实例区别在于-b只在非空行前显示行号 。汇总

8. 同时查看2个文件中的个C管理站姿拍照室外群子内容

位于/root文件夹里有两个文件取名linux及desktop，通过管道符对内容进行排序显示 。命令

cat是文件一条linux内置命令. 几乎所有linux发行版都内置（译注：或者说我从未听说过不内置cat命令的发行版）。Linux系统存在着多种文本编辑器 ，实例大多数配置文件 、汇总可按如下方法 :

# cat /root/linux /root/desktop ubuntucentosredhatmintslackwaregnomekdexfceenlightmentcinnamon

9. 排序显示

类似. 你也可以结合cat命令与其它命令来进行自定义输出. 如结合 sort ，如下所示 :

# cat -E /etc/hosts # Do not remove the following line, or various programs$# that require network functionality will fail.$127.0.0.1 localhost.localdomain localhost$::1 localhost6.localdomain6 localhost6$

6. 同时显示制表符及换行符

当你想要同时达到-T及-E的效果, 可使用-A参数.

# cat -A /etc/hosts # Do not remove the following line, or various programs$# that require network functionality will fail.$127.0.0.1^I^Ilocalhost.localdomain localhost$::1^I^Ilocalhost6.localdomain6 localhost6$

7. 分屏显示

当文件内容显示超过了你的屏幕大小, 可结合cat命令与其它命令分屏显示。日志文件，加上-n参数可以实现.

# cat -n /etc/ntp.conf 1 # Permit time synchronization our time resource but do not2 # permit the source to query or modify the service on this system3 restrict default kod nomodify notrap nopeer noquery4 restrict -6 default kod nomodify notrap nopeer noquery56 # Permit all access over the loopback interface. This could be7 # tightened as well, but to do so would effect some of the8 # administration functions9 restrict 127.0.0.110 restrict -6 ::1

3. 在非空格行首显示行号

类似于-n参数 ，举例 :

# cat /root/linux | sort centosmintredhatslackwareUbuntu

10. 输入重定向

你也可将显示结果输出重定向到屏幕或另一个文件 。将结果输出并生成linux-sort新文件

然后我们看看linux-sort中的内容 :

centosmintredhatslackwareubuntu

以上是一些cat命令的日常基本应用. 更多相关你可从cat命令手册中学到并记得经常练习它们.

via: http://linoxide.com/linux-command/13-cat-command-examples/

译者：hongchuntang 校对：Caroline

关键词 ：Cat命令

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#cat -b /etc/ntp.conf 1 # Permit time synchronization our time resource but do not2 # permit the source to query or modify the service on this system3 restrict default kod nomodify notrap nopeer noquery4 restrict -6 default kod nomodify notrap nopeer noquery 5 # Permit all access over the loopback interface. This could be6 # tightened as well, but to do so would effect some of the7 # administration functions8 restrict 127.0.0.19 restrict -6 ::1

# cat -T /etc/hosts # Do not remove the following line, or various programs # that require network functionality will fail.127.0.0.1^I^Ilocalhost.localdomain localhost::1^I^Ilocalhost6.localdomain6 localhost6

gnomekdexfceenlightmentcinnamonubuntucentosredhatmintslackware

# cat < /root/linux

# cat /root/linux >> /root/desktop # cat /root/desktop

# cat < /root/linux | sort > linux-sort

# cat /root/linux > /root/linuxdistro