[ ARG1 OP ARG2 ] “OP” is one of -eq, -ne, -lt, -le, -gt or -ge. These arithmetic binary operators return true if “ARG1” is equal to, not equal to, less than, less than or equal to, greater than, or greater than or equal to “ARG2”, respectively. “ARG1” and “AR...
/bin/bash#Device=/dev/sda3ifmount|grep"$Device"&>/dev/null;thengrep"$Device"|cut-d""-f3elseecho"$Deviceis not exist"fi 1. 2. 3. 4. 5. 6. 7. 8. 三、bash条件测试 1.整数测试 2.字符测试 3.文件测试 整数测试:数值1比较符号数值2 比较符号: -ge:相等(equal) -ne:不等(not equal...
[ ARG1 OP ARG2 ] “OP” is one of -eq, -ne, -lt, -le, -gt or -ge. These arithmetic binary operators return true if “ARG1” is equal to, not equal to, less than, less than or equal to, greater than, or greater than or equal to “ARG2”, respectively. “ARG1” and “AR...
ne 不等于 not equal ge 大于等于 greater or equal le 小于等于 less or equal 注意: 每一个选项前须要有一个短横线-。 还要注意的是使用以上操作符,那么操作符两边一定要是整数。 在Bash中,即使给整数加了引號。比方"123",也视作整数。但假设某一位含有整数[0-9]以外的字符比方。12a,"12a",则不行。
A -ne B: 不等于 not equal to 2.3 字符串测试:A, B A > B A < B A >= B A <= B A == B或A = B:等值比较 A != B: 不等于 -z A: 判断A是否为空;空则为真,不空则假; -n A:判断A是否不空;不空则为真,空则为假; =~ "$A" =~ PATTERN 如果变量A中保存的字符串能被PATTERN...
The two strings are not equal. 例2 我们还可以使用运算符来测试两个字符串是否不相等!=。 代码语言:txt AI代码解释 #!/bin/bash string1="apples" string2="oranges" if [ "$string1" != "$string2" ]; then echo "Strings are different." ...
-ne 即-Not Equal的缩写,表示不等于 -o 即-or,表示前后二个逻辑判断是『或』的关系,类似的 -a 即-and,表示前后二个逻辑判断是『与』的关系 elif 即else if的缩写 上面的示例运行结果: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 ./demo.sh90+i=90+test90-gt89+echoAA ...
is readable-s FILE_NAM # TrueifFILE_NAM existsandisnotempty-w FILE_NAM # TrueifFILE_NAM has write permission-x FILE_NAM # TrueifFILE_NAM is executable#字符串测试操作-z STRING # TrueifSTRING is empty-n STRING # TrueifSTRING isnotemptySTRING1...
if [ -f /path/to/file ]; then echo "File exists" else echo "File does not exist" fi # 使用循环 for i in {1..5}; do echo "Iteration $i" done 3. 设置文件权限 你需要确保脚本文件具有可执行权限。使用chmod命令: chmod +x myscript.sh ...
TestFile1 does not exist or is empty. 向文件添加一些内容,然后再测试一次: [student@studentvm1 testdir]$ File="TestFile1" ; echo "This is file $File" > $File ; if [ -s $File ] ; then echo "$File exists and contains data." ; else echo "$File does not exist or is empty." ...