Linux文件系统命令 cat

命令名：cat

功能：在当前窗口中查看制定位置的文件的内容。

eg:

renjg@renjg-HP-Compaq-Pro-6380-MT:~/test$ cat /etc/apache2/ports.conf 
# If you just change the port or add more ports here, you will likely also
# have to change the VirtualHost statement in
# /etc/apache2/sites-enabled/000-default.conf

Listen 80
Listen xxxx
Listen xxxx
<IfModule ssl_module>
    Listen 443
</IfModule>

<IfModule mod_gnutls.c>
    Listen 443
</IfModule>

# vim: syntax=apache ts=4 sw=4 sts=4 sr noet
renjg@renjg-HP-Compaq-Pro-6380-MT:~/test$ 

常见用法：将输出的内容显示行号

renjg@renjg-HP-Compaq-Pro-6380-MT:~/test$ cat -n /etc/apache2/ports.conf 
     1    # If you just change the port or add more ports here, you will likely also
     2    # have to change the VirtualHost statement in
     3    # /etc/apache2/sites-enabled/000-default.conf
     4    
     5    Listen 80
     6    Listen xxxx
     7    Listen xxxx
     8    <IfModule ssl_module>
     9        Listen 443
    10    </IfModule>
    11    
    12    <IfModule mod_gnutls.c>
    13        Listen 443
    14    </IfModule>
    15    
    16    # vim: syntax=apache ts=4 sw=4 sts=4 sr noet
renjg@renjg-HP-Compaq-Pro-6380-MT:~/test$