more command
more命令会一页一页的显示
命令格式： more [选项] 文件
Common parameters
| parameter | description |
|---|---|
| +n | From the start page n display |
| -n | Screen size is defined as the n-th row |
| +/pattern | The search string (pattern) before each file is displayed, and then began to show before and after the string after two lines |
| -c | From the top of the screen is cleared, and then display |
Common Operations
| symbol | description |
|---|---|
| = | Output line number of the current row |
| q | Quit more |
| space bar | Scroll down a screen |
| b | Return to the previous screen |
Example of the
Start from the fifth row displays the contents of the file test.log
more +5 test.log
Example two
Find the first file test.log 'g' string line appears
more + / g test.log
Example Three
Set the number of lines per screen is 5
More -5 test.log
Example Four
Use || and more command displays the / etc directory information
|| / etc | more -10
less command
less命令也是对文件或其他输出进行分用显示的工具
命令格式：less 【选项】 文件
Common parameters
| parameter | description |
|---|---|
| -e | After the end of the file is displayed automatically leave |
| -f | Forced to open a special file, such as a peripheral device number, directory and binary files |
| -i | Ignore case when searching |
| -m | Shows the percentage is similar to the more command |
| -N | Display line numbers for each line |
| -s | Empty display continuous line of conduct |
Common Operations
| symbol | description |
|---|---|
| / String | Down search 'string' function |
| ? String | Search up "string" feature |
| n | Repeat the search |
| N | Front inverted repeat a search |
| b | Turn one page forward |
| d | Backward half page |
| q | Exit the less command |
| space bar | Back down one page |
| UP ARROW | Flip up one line |
Common examples
Example a: test.log realizing content file and line number
less -N test.log
Example Two: test.log display content file, the search string "AC"
less test.log
/ AC
Example Three: ps to view and process information displayed by the less pager
ps -f | less
head command
head主要是用来显示档案的开头至标准中输出，默认行为10行
命令格式
head [选项] [文件]
Common parameters
| parameter | description |
|---|---|
| -q | Hide file name |
| -v | Displays the file name |
| -c <byte> | The number of bytes the display |
| -n <line number> | 显示行数 |
常用范例
例一：试试test.log文件中前5行的内容
head -n 5 test.log
例二：显示test.log和data.log文件中的前5行内容
head -n 5 test.log data.log
tail命令
tail命令主要用于显示指定文件末尾。常用来查看日志文件 命令格式：tail 【选项】 【文件】
常用参数
| 参数 | 描述 |
|---|---|
| -f | 循环读取 |
| -q | 不显示处理信息 |
| -v | 显示详细的处理信息 |
| -c<字节> | 显示的字节数 |
| -n | 显示行数 |
常用范例
例一：显示test.log文件中的最后5行内容
tail -n 5 test.log
例二：打印某日志test.log文件中的最后5行内容，不断的将新写入的日志显示出来
tail -n 5 -f test.log
