shell字符截取命令之cut命令的实例详解_linux shell_

 cut [选项] 文件名 选项： -f 列号：提取第几列 -d 分隔符：按照指定分隔符分割列 

 [root@localhost ~]# cat student.txt 1 furong F 85 2 fengj F 60 3 cang F 70 [root@localhost ~]# cut -f 2 student.txt furong fengj cang [root@localhost ~]# cut -f 2,4 student.txt furong 85 fengj 60 cang 70 [root@localhost ~]# grep "/bin/bash" /etc/passwd|grep -v "root"|cut -f 1 -d ":" cakin24 test cls [root@localhost ~]# cut -d ":" -f 1,3 /etc/passwd root:0 bin:1 daemon:2 adm:3 lp:4 sync:5 shutdown:6 halt:7 mail:8 operator:11 games:12 ftp:14 nobody:99 systemd-bus-proxy:999 systemd-network:998 dbus:81 polkitd:997 abrt:173 unbound:996 tss:59 colord:995 usbmuxd:113 geoclue:994 rpc:32 rtkit:172 chrony:993 radvd:75 qemu:107 avahi-autoipd:170 setroubleshoot:992 rpcuser:29 nfsnobody:65534 saslauth:991 libstoragemgmt:990 pulse:171 gdm:42 gnome-initial-setup:989 avahi:70 sshd:74 postfix:89 ntp:38 tcpdump:72 cakin24:1000 test:1003 cls:1001 

 df -h|cut -d " " -f 1,3