if [ int1 -gt int2 ] 如果> if [ int1 -le int2 ] 如果<= if [ int1 -lt int2 ] 如果< 字符串变量表达式 If [ $a = $b ] 如果string1等于string2 字符串允许使用赋值号做等号 if [ $string1 != $string2 ] 如果string1不等于string2 if [ -n $string ] 如果string 非空(非0),返...
if[ $string1 !=$string2 ]如果string1不等于string2 if[ -n $string]如果string 非空(非0),返回0(true) if[ -z $string]如果string 为空 if[ $sting ]如果string 非空,返回0 (和-n类似) 条件表达式引用变量要带$ if [ a = b ] ;then echo equal else echo no equal fi [macg@machome ~...
elif [[ $1 = 'redis' ]] || [[ $1 = 'zookeeper' ]]; then echo "Input is $1"else echo "Input Is Error."fi 然而，初次尝试时，我们可能会误用为'else if'，导致脚本执行出错。如在测试脚本中：bash [oracle@standby ~]$ ./ts01.sh zookeeper ./ts01.sh: line 12: syntax ...
then echo "Input is $1"else echo "Input Is Error."fi 2.执行脚本,看脚本是否正常执行 [oracle@standby ~]$ ./ts01.sh zookeeper./ts01.sh: line 12: syntax error: unexpected end of file 备注:发现执行是错误的,经过查看可以知道,shell脚本中不是else if而是elif这个写法 3.修改脚本 #!/bin/...
sh #!/bin/bash fail=0 while ((1==1)) do read -p "please enter you username: " user read -p "please enter you password: " password if [[ $user = 'guoke' && $password = 'guoke123' ]];then echo "login success" exit 1 else if [ $? -ne 0 ];then let fail=fail+1 #...
If a native build is happening, # then ARCH is assigned, getting whatever value it gets normally, and # SUBARCH is subsequently ignored. ifneq ($(CROSS_COMPILE),) SUBARCH := $(shell echo $(CROSS_COMPILE) | cut -d- -f1 | sed 's:^.*/::g') else SUBARCH := $(shell uname -m...
每个if语句都要用fi结束，而且是每一个if都要对应一个fi。整个if语句用fi闭合起来才算完整，书写时if和fi要垂直对齐以方便查看。格式举例：if condition then command1 command2 fi condition是判断条件，如果 condition 成立（返回“真”），那么 then 后边的语句将会被执行；如果 condition 不成立（...
This command checks for file syntax errors after you save the file. That’s it for sudo for now. If you need to use its more advanced features, see the sudoers(5) and sudo(8) manual pages. (The actual mechanics of user switching are covered in Chapter 7.) 注意使用visudo命令编辑/etc...
在我顿悟后,进入 bios,果然发现快速启动下的sata support设置成仅最后一次加载的 SATA 设备。改成所有 sata 设备后,Grub2 正常引导 Windows Boot Manager。 这个问题跟哪个系统没关系,只是因为我的 Windows 装在 sata 接口的固态里。而 Rocky 装在 NVMe 的固态里。
fi # Run commands: list, clear if [[ $COUNT -eq 1 ]]; then if [[ "$COMMAND" == "list" ]]; then at -l elif [[ "$COMMAND" == "clear" ]]; then at -r $(atq | cut -f1) else echo "remind: unknown command $COMMAND. Type 'remind' without any parameters to see syntax....