more命令,功能类似cat,cat命令是整个文件内容从上到下显示在屏幕上的。more会以一页一页的显示方便使用者逐页浏览,而最基本的指令就是按空白键就往下一页显示,按b键就会往回一页显示,而且还有搜索字符串的功能。more命令从前向后读取文件,因此在启动时就加载整个文件。

【命令格式】

 more[-dlfpcsu][-num][+/pattern][+linenum][file ...]

【命令功能】

 more命令和cat的功能一样都是查看文件中的内容,但是有所不同的是more可以按页来查看文件的内容,还支持直接跳转行等功能。

【命令参数】

 +n     从第n行开始显示

 -n     定义屏幕大小为n行

 +/pattern   在每个档案显示前搜索该字串(pattern),然后从该字串前两行之后开始显示

 -c     从顶部清屏,然后显示

 -d     提示“Press space to continue,‘q’ to quit”,禁用响铃功能

 -l     忽略Ctrl+l(换页)字符

 -p     通过清除窗口而不是滚屏来对文件进行换页,与-c选项相似

 -s     把连续的多个空格显示为一行

 -u     把文件内容中的下划线去掉

【常用操作命令】

Enter    向下n行,需要定义。默认为1行

Ctrl+F   向下滚动一屏

空格键   向下滚动一屏

ctrl+B   返回上一屏

=        输出当前行的行号

:f       输出文件名和当前行的行号

V        调用vi编辑器

!命令    调用shell,并执行命令

q        退出more

【实例展示】

每屏以三行的形式进行显示:

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[root@node1 ~]# more -3 my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock   
--More--(25%)       #显示文本进度


搜索文本中出现的第一个#,并显示输出:

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[root@node1 ~]# more +/# my.cnf
...skipping          #输出标示
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks                 #出现的第一个#号,显示前两行之后的内容
symbolic-links=0
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid


与管道结合进行分页显示:

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[root@node1 ~]# cat test.log | more
PING 172.16.18.6 (172.16.18.6) 56(84) bytes of data.
64 bytes from 172.16.18.6: icmp_seq=1 ttl=64 time=0.407 ms
64 bytes from 172.16.18.6: icmp_seq=2 ttl=64 time=0.559 ms
64 bytes from 172.16.18.6: icmp_seq=3 ttl=64 time=0.485 ms
64 bytes from 172.16.18.6: icmp_seq=4 ttl=64 time=0.595 ms
64 bytes from 172.16.18.6: icmp_seq=5 ttl=64 time=0.610 ms
64 bytes from 172.16.18.6: icmp_seq=6 ttl=64 time=0.574 ms
64 bytes from 172.16.18.6: icmp_seq=7 ttl=64 time=0.887 ms
64 bytes from 172.16.18.6: icmp_seq=8 ttl=64 time=0.549 ms
64 bytes from 172.16.18.6: icmp_seq=9 ttl=64 time=0.447 ms
64 bytes from 172.16.18.6: icmp_seq=10 ttl=64 time=0.543 ms
64 bytes from 172.16.18.6: icmp_seq=11 ttl=64 time=0.552 ms
64 bytes from 172.16.18.6: icmp_seq=12 ttl=64 time=0.519 ms
64 bytes from 172.16.18.6: icmp_seq=13 ttl=64 time=0.627 ms
64 bytes from 172.16.18.6: icmp_seq=14 ttl=64 time=0.482 ms
64 bytes from 172.16.18.6: icmp_seq=15 ttl=64 time=0.560 ms
64 bytes from 172.16.18.6: icmp_seq=16 ttl=64 time=0.559 ms
64 bytes from 172.16.18.6: icmp_seq=17 ttl=64 time=0.561 ms
64 bytes from 172.16.18.6: icmp_seq=18 ttl=64 time=0.565 ms
64 bytes from 172.16.18.6: icmp_seq=19 ttl=64 time=0.528 ms
64 bytes from 172.16.18.6: icmp_seq=20 ttl=64 time=0.520 ms
64 bytes from 172.16.18.6: icmp_seq=21 ttl=64 time=0.620 ms
64 bytes from 172.16.18.6: icmp_seq=22 ttl=64 time=0.542 ms
64 bytes from 172.16.18.6: icmp_seq=23 ttl=64 time=0.573 ms
64 bytes from 172.16.18.6: icmp_seq=24 ttl=64 time=0.545 ms
--More--          #这种显示方式会依照当前终端的显示空间来显示
[root@node1 ~]# cat test.log | more -5
PING 172.16.18.6 (172.16.18.6) 56(84) bytes of data.
64 bytes from 172.16.18.6: icmp_seq=1 ttl=64 time=0.407 ms
64 bytes from 172.16.18.6: icmp_seq=2 ttl=64 time=0.559 ms
64 bytes from 172.16.18.6: icmp_seq=3 ttl=64 time=0.485 ms
64 bytes from 172.16.18.6: icmp_seq=4 ttl=64 time=0.595 ms
--More--         #这种是依照每页5行的方式进行显示
这种情况下可以使用Ctrl+F或空格键切换至下个五行,但是使用Ctrl+F会跳一行再进行显示下五行,而使用空格键会直接显示下个五行。使用回车键则直接会显示下一行。
#########使用空格键切换的情况#######
[root@node1 ~]# cat test.log | more -5
PING 172.16.18.6 (172.16.18.6) 56(84) bytes of data.
64 bytes from 172.16.18.6: icmp_seq=1 ttl=64 time=0.407 ms
64 bytes from 172.16.18.6: icmp_seq=2 ttl=64 time=0.559 ms
64 bytes from 172.16.18.6: icmp_seq=3 ttl=64 time=0.485 ms
64 bytes from 172.16.18.6: icmp_seq=4 ttl=64 time=0.595 ms
64 bytes from 172.16.18.6: icmp_seq=5 ttl=64 time=0.610 ms
64 bytes from 172.16.18.6: icmp_seq=6 ttl=64 time=0.574 ms
64 bytes from 172.16.18.6: icmp_seq=7 ttl=64 time=0.887 ms
64 bytes from 172.16.18.6: icmp_seq=8 ttl=64 time=0.549 ms
64 bytes from 172.16.18.6: icmp_seq=9 ttl=64 time=0.447 ms
##########使用Ctrl+F切换的情况######
64 bytes from 172.16.18.6: icmp_seq=8 ttl=64 time=0.549 ms
64 bytes from 172.16.18.6: icmp_seq=9 ttl=64 time=0.447 ms
...skipping one line         #跳一行
64 bytes from 172.16.18.6: icmp_seq=11 ttl=64 time=0.552 ms
64 bytes from 172.16.18.6: icmp_seq=12 ttl=64 time=0.519 ms
64 bytes from 172.16.18.6: icmp_seq=13 ttl=64 time=0.627 ms
64 bytes from 172.16.18.6: icmp_seq=14 ttl=64 time=0.482 ms
64 bytes from 172.16.18.6: icmp_seq=15 ttl=64 time=0.560 ms