cat
cat 是查看文本中所有数据的命令。
[root@linux-node1 ~]# cat anaconda-ks.cfg #version=DEVEL # System authorization information auth --enableshadow --passalgo=sha512 # Use CDROM installation media cdrom # Use graphical install graphical # Run the Setup Agent on first boot firstboot --enable ignoredisk --only-use=sda # Keyboard layouts keyboard --vckeymap=us --xlayouts='us' # System language lang en_US.UTF-8
参数：
-n 给所有的行加上行号：
[root@linux-node1 ~]# cat -n 123.txt 1 #version=DEVEL 2 # System authorization information 3 auth --enableshadow --passalgo=sha512 4 # Use CDROM installation media 5 cdrom 6 # Use graphical install 7 graphical 8 # Run the Setup Agent on first boot 9 firstboot --enable 10 ignoredisk --only-use=sda 11 # Keyboard layouts 12 keyboard --vckeymap=us --xlayouts='us' 13 # System language 14 lang en_US.UTF-8
-b 给有文本的行加上行号
[root@linux-node1 ~]# cat -b 123.txt 1 #version=DEVEL 2 # System authorization information 3 auth --enableshadow --passalgo=sha512 4 # Use CDROM installation media 5 cdrom 6 # Use graphical install 7 graphical 8 # Run the Setup Agent on first boot 9 firstboot --enable 10 ignoredisk --only-use=sda 11 # Keyboard layouts 12 keyboard --vckeymap=us --xlayouts='us' 13 # System language 14 lang en_US.UTF-8
-T 参数会用^|字符组合去替换文件中的所有制表符
[root@linux-node1 ~]# cat -T 123.txt #version=DEVEL # System authorization information auth --enableshadow --passalgo=sha512 # Use CDROM installation media cdrom # Use graphical install graphical 1^I2^I3 4^I5 # Run the Setup Agent on first boot firstboot --enable ignoredisk --only-use=sda # Keyboard layouts keyboard --vckeymap=us --xlayouts='us' # System language lang en_US.UTF-8