在Bash脚本中,可以使用条件判断语句来实现即使条件失败也要继续while循环的需求。具体实现可以通过使用if语句结合break和continue来控制循环的继续与跳出。 示例代码如下: 代码语言:txt 复制 #!/bin/bash while true; do # 进行条件判断 if [ 条件 ]; then # 执行成功的操作 # 使用continue语句继续while循...
/bin/bash#pan(){if[$[RANDOM%11]-$15];thenecho" congritulation,you win."echo"$[RANDOM%11]"elif[$[RANDOM%11]-$25];thenecho"sorry ,you lose."echo"$[RANDOM%11]"elseecho"$[RANDOM%11]"exitfi}read-p"plesae guess big or small: "daxiaocase$daxiaoinbig)pan gt le;;small)pan le...
You can easily evaluate the options passed on the command line for a script using while loop: ... .. while getopts ae:f:hd:s:qx: option do case "${option}" in a) ALARM="TRUE";; e) ADMIN=${OPTARG};; d) DOMAIN=${OPTARG};; f) SERVERFILE=$OPTARG;; s) WHOIS_SERVER=$OPTARG...
当在Bash中使用带有if语句的while循环时,如果循环条件始终为true,循环将无限执行下去,导致停滞在true循环中。这可能是因为循环条件的判断逻辑有误,或者在循环体内没有适当的语句来改变循环条件的值。 为了解决这个问题,我们可以在循环体内添加适当的语句来改变循环条件的值,以便在满足特定条件时退出循环。例如,...
/bin/bashwhile! bash -n$1&>/dev/null ;doread-p"Scripts syntax error,Please input any key edit scripts or q|Q quit: "SCRIPTcase$SCRIPTinq|Q)echo"quit edit..."exit8 ;; *) vim$1;;esacdone检查脚本,脚本语法错误时将进入循环;当输入q或者Q时,退出脚本;当输入任意键则vim编辑脚本,脚本修改...
$bashbash.sh Conclusion: This tutorial guide was about using the “while true” loop in the Bash script. We have discussed using a while true loop with very simple Bash codes and addressed the while loop with no “true” condition. This has been done to clearly compare both circumstances ...
whileLoop inbash ThewhileLoop Syntax Awhileloop inbashconsists of a conditional expression and a loop body which is surrounded bydoanddone. The loop body continues to be executed as long as the condition evaluates to true. The conditional expression inwhileloop can be surrounded by either a pa...
/bin/bashwhiletrue;doread-p"please input the menu:cpu,mem,disk,quit:"variablecase$variableincpu) lscpubreak;; mem) free-mbreak;; disk) fdisk-l /dev/[shv]d[a-z][0-9]break;;*) echo"error,again";; esac done 看一下效果 现在我们来编写一个服务框架:...
If you want to do something more elaborate, you could create a script and show a more clear indication that the loop condition became true: #!/bin/bashwhile[!-ddirectory_expected]doecho"`date`- Still waiting"sleep1doneecho"DIRECTORY IS THERE!!!" ...
And if you were to use the same script, you can expect the following: Like you, there are special variables too! Did you know that there are special variables in bash? Yep, there are 9 types of special variables in bash. Want to know what they are and how to use them? Here you...