"Shell" multi-Command execution order

; for example
[Email protected] ~]# date;dd if=/dev/zero  of=/home/1  bs=1k count=10240;date  # #统计dd命令消耗时间, where/dev/ Zero empty file Tue June 15:15:02 CST 201610240+0 Records in10240+0 records out10485760 bytes (ten MB) copied, 0.0224696 s, 467 M B/stue June 15:15:02 CST 2016

&& Example

[[email protected] ~]# ls &&echo yes1  anaconda-ks.cfg  install.log  install.log.syslog  Shellyes[[email protected] ~]# LSS &&echo yes-bash:lss:command not found

　

|| Example

[[email protected] ~]# ls | | echo yes1  anaconda-ks.cfg  install.log  install.log.syslog  shell[[email protected] ~]# LSD | | echo Yes-bash:lsd:command not Foundyes

　　

Pipeline "|"

"Shell" multi-Command execution order