Introduction to LINUXshell script

LINUXshell script introduction echoHelloworld! Equivalent to echo & amp; #39; Helloworld! & Amp; #39; but not equivalent to echo & quot; Helloworld! & Quot ;(! When placed in double quotation marks, escape \) www.2cto.com simple judgment example 1 #! /Bin/bas... LINUX shell script introduction echo Hello world! Equivalent to echo 'Hello world! 'But not equivalent to echo "Hello world! "
(! When placed in double quotation marks, escape \) www.2cto.com simple judgment example 1 #! /Bin/bash2if [$ UID ne 0]; then3 echo Non root user. Please run as root.4else5 echo "Root user" 6fi... rest for a while and continue www.2cto.com continue 1 #! /Bin/bash2start = $ (data + % s) 3 commands; 4 statements; 5end = $ (data + % s) 6 differenc = $ (end-start )) 7 echo Time taken to execute commands is $ difference seconds.