Linux less命令

Linux less命令：回卷显示文本文件

Linux less命令 功能描述

使用less命令可以回卷显示文本文件的内容。less命令的作用与more十分相似，都可以用来浏览文本文件的内容，不同的是less命令允许使用者往回卷动。

Linux less命令 语法

less [选项] [文件]

命令中各选项的含义如表所示。

在使用less命令时，可以使用表所示的子命令。

Linux less命令 示例

回卷显示/etc/services文件的内容

[root@rhel ～]# less /etc/services
# /etc/services:
# Id: services, v 1.482009/11/11 14:32:31 ovasik Exp
#
# Network services, Internet style
# IANA services version: last updated 2009-11-10
#
# Note that it is presently the policy of IANA to assign a single well-known
# port number for both TCP and UDP; hence, most entries here have two entries
# even if the protocol doesn't support UDP operations.
#Updated from RFC 1700, ''Assigned Numbers''(October 1994). Not all ports
# are included, only the more common ones.
#
# The latest IANA port assignments can be gotten from
#   http://www.iana.org/assignments/port-numbers
# The Well Known Ports are those from 0 through 1023.
# The Registered Ports are those from 1024 through 49151
# The Dynamic and/or Private Ports are those from 49152 through 65535
#
# Each line describes one service, and is of the form:
#
#service-name port/protocol [aliases...] [#comment]
tcpmux      1/tcp                        #TCP port service multiplexer
tcpmux      1/udp                       #TCP port service multiplexer
rje          5/tcp                        #Remote Job Entry
rje          5/udp                       #Remote Job Entry
echo        7/tcp
echo        7/udp
discard      9/tcp       sink null
discard      9/udp       sink null
systat       11/tcp       users
systat       11/udp      users
daytime     13/tcp
daytime     13/udp
qotd       17/tcp       quote
qotd       17/udp       quote
msp       18/tcp                       #message send protocol
msp       18/udp                       #message send protocol
/etc/services