Common commands in the shell

Shell Special Symbol Cut command
* * indicates wildcard characters
?? represents an arbitrary character
# #号注释字符, the annotated content will not take effect
The \ \ symbol denotes the caret character, leaving the special symbol out of the original special usage

Cut for segmentation
Cut-d Separator-F filter Field/File
-d Specifies the delimiter, separated by commas, to display multiple fields, such as 3,6
-f Specifies the number of characters in the column
-C cut interval characters, such as 3-6-interval characters

[[email protected] tmp]# cat passwd |head -5 |cut -d ":" -f 1      cut截取第一段内容rootbindaemonadmlp[[email protected] tmp]# cat passwd |head -5 |cut -d ":" -f 1,2  cut截取第1、2段内容root:xbin:xdaemon:xadm:xlp:x[[email protected] tmp]# cat passwd |head -5 |cut -d ":" -f 1-3   cut截取1到3段内容root:x:0bin:x:1daemon:x:2adm:x:3lp:x:4[[email protected] tmp]# cat passwd |head -5 |cut -d ":" -f 1,3,6    cut截取1、3、6段内容root:0:/rootbin:1:/bindaemon:2:/sbinadm:3:/var/admlp:4:/var/spool/lpd

Sort_wc_uniq command

Tee_tr_split command

Shell special symbol under

Common commands in the shell