syntax error near unexpected token fi 等都是这样引起的. 5 if 后面一定要跟上 then. 同理 elif 后面一定要跟上 then. 不然提示出错信息: syntax error near unexpected token else top BASH IF http://lhsblog01.blog.163.com/blog/static/102004519
Bash 中的if命令有一个then子句,子句中包含测试或命令返回 0 时要执行的命令列表,可以有一个或多个可选的elif子句,每个子句可执行附加的测试和一个then子句,子句中又带有相关的命令列表,最后是可选的else子句及命令列表,在前面的测试或elif子句中的所有测试都不为真的时候执行,最后使用fi标记表示该结构结束。 使...
bash if [ $a -eq $b ]then echo "a is equal to b"fi 总结来说，解决Bash中的"syntax error: unexpected"错误需要仔细检查并理解报错信息，定位错误位置，并对照Bash的语法规则进行修正。通过逐步排查和测试，可以确保脚本或命令行符合Bash的期望，从而消除这类错误。
In order to execute a Bash “if else” statement, you have to use four different keywords : if, then, else and fi : if: represents the condition that you want to check; then: if the previous condition is true, then execute a specific command; else: if the previous condition is false...
比如if grep "\<bash\>" /etc/passwd ; then echo "111" fi 此时if会自动获取右侧grep命令执行后的状态结果,是0则if会认为是满足条件的,会输出111 此时不会使用到[] 2 整数测试/比较: 数值比较一定加[] -eq: 测试两个整数是否相等;比如 $A -eq $B ...
alias ip="ifconfig | grep -oE 'inet.*netmask' | grep -oE '(\d+\.){3}\d+' | sed -n 2p" 还可以在 vscode 中安装 'code' 命令。 这样你就可以在命令行中快速用 vscode 打开项目。 code PROJECT 工具系列 # Fix `tree` chinese encode ...
Bash supports if-else statements so that you can use logical reasoning in your shell scripts. The generic if-else syntax is like this: if [ expression ]; then ## execute this block if condition is true else go to next elif [ expression ]; then ...
'Else if'in bash scripting, often written as'elif', is used to check multiple conditions in your code. It is used with the syntax,if [firstStatement]; then... elif [secondCondition]; then... else. It’s a powerful tool that allows your scripts to make decisions based on various scen...
echo "today is :"$(date +'%Y-%m-%d') 我们使用-x选项来执行脚本,结果如下 [root@VM-0-2-centos shell_debug]# bash -x ta.sh ++ date +%Y-%m-%d + echo 'today is :2021-07-10' today is :2021-07-10 从结果中可以看到,在执行前打印出了每一行命令,行前面的+号表示调试信息,它实际是环...
if [ -f $i ]; then lines=$(wc -l $i | cut -d " " -f 1) textCount=$[$textCount+1] lineCount=$[$lineCount+$lines] fi done echo "The number of text file is $textCount." echo "The number of line of text file is $lineCount." ...