问题1：如何在vi编辑器中，显示行号

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#linux #vi #行号

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本文介绍在Linux环境下，使用vi编辑器显示行号的方法。可利用vi命令打开文件，在命令行模式输入“:set nu”回车；也可在编辑模式按“Esc”回到命令行模式，再输入该命令回车，即可显示每行的行号。

目的：linux 环境下，vi 编辑器中显示行号

1. 利用vi 命令打开一个文件：

$ vi oratab

2.在命令行模式下，输入“冒号 + set nu” 命令，点击回车，就可以显示每行的行号

:set nu

操作过程：

/***********************************************************************/

#

# This file is used by ORACLE utilities. It is created by root.sh
# and updated by the Database Configuration Assistant when creating
# a database.

# A colon, ':', is used as the field terminator. A new line terminates
# the entry. Lines beginning with a pound sign, '#', are comments.
#
# Entries are of the form:
# $ORACLE_SID:$ORACLE_HOME:<N|Y>:
#
# The first and second fields are the system identifier and home
# directory of the database respectively. The third filed indicates
# to the dbstart utility that the database should , "Y", or should not,
# "N", be brought up at system boot time.
#
# Multiple entries with the same $ORACLE_SID are not allowed.
#
#
radius:/home/oracle/app/oracle/product/10g:Y
~
~
:set nu

/***********************************************************************/

或者

在编辑模式下，敲击键盘上的"Esc"键回到命令行模式，输入“冒号 + set nu” 命令，点击回车，也可以显示每行的行号

返回结果如下：

/***********************************************************************/

1 #
2
3
4
5 # This file is used by ORACLE utilities. It is created by root.sh
6 # and updated by the Database Configuration Assistant when creating
7 # a database.
8
9 # A colon, ':', is used as the field terminator. A new line terminates
10 # the entry. Lines beginning with a pound sign, '#', are comments.
11 #
12 # Entries are of the form:
13 # $ORACLE_SID:$ORACLE_HOME:<N|Y>:
14 #
15 # The first and second fields are the system identifier and home
16 # directory of the database respectively. The third filed indicates
17 # to the dbstart utility that the database should , "Y", or should not,
18 # "N", be brought up at system boot time.
19 #
20 # Multiple entries with the same $ORACLE_SID are not allowed.
21 #
22 #
23 radius:/home/oracle/app/oracle/product/10g:Y