Scripting - how to make an if-else in csh script, I'm trying to make an if-else in csh script but it is not working: do you know why this is not working? if Making statements based on opinion; back them up with references or personal experience. To learn more, see our tips on ...
写法2:我们改变一下第一个fi的位置就可以输出嵌套的if-then语句内容,但是if-then-else加if-then两种语句的结合。 [00:19:23 root@libin3 libin]# vim shell24 #!/bin/bash # Test is if-then-else-fi V2 # libin=rhce # if grep $libin /etc/passwd then echo "the user $libin exist in syste...
"a user-name in the password file" else echo "At least one of the three test conditions is false" fi Using -e option in sh Example 6 Using /usr/bin/test for the -e option If one really wants to use the -e option in sh, use /usr/bin/test, as in the following: if [ ! -h...
then command else command fi 1. 2. 3. 4. 5. 当if 返回的状态码是0时,then部分命令会执行,当if返回状态码非0时,shell会执行else部分的命令 AI检测代码解析 [root@zw-test-db ~]# vim test4 #!/bin/bash # test if - then -else testuser=badoracle if grep $testuser /etc/passwd then echo...
"&&exit1if[$1-ge$2];thenecho"First number$1is bigger"elseecho"Second number$2is bigger"fi[root@localhost test]# chmod +x if12[root@localhost test]# ./if12Please give two number![root@localhost test]# ./if12 3 9Second number9is bigger...
$ csh $ if [ -f /export/home/insite/.insiteINFO ] ; then echo "1" ; else echo "0" ; fi if: Expression Syntax. then: Command not found. else? Run Code Online (Sandbox Code Playgroud) 尝试将测试包装在 /bin/sh 中: $ /bin/sh -c 'if [ -f /export/home/insite/.insiteINFO...
我在匹配sh外壳中的任意字符串时遇到了困难。代码是configure.ac的一部分,所以它通常得到可用的最薄的外壳。我不能指望弹壳。然后,根据如何在shell脚本bash中检查子字符串?、外壳脚本中的子字符串签入如果条件和if/else与通配符比较使用case语句执行一个小的修复: "ld -m*") LDNAME=ldesa ...
else echo "Welcome, $name. You are old enough." fi 在上面的示例中,我们使用source命令引入了一个名为external_script.sh的外部脚本。然后,我们定义了一个名为name的变量,并将其设置为"John",定义了一个名为age的变量,并将其设置为25。接下来,我们使用if语句判断age是否小于18,如果是,则输出一条消息表示...
其中elif和else可选。 例:#!/bin/sh Fruit=apple F=b if $Fruit>$F; then echo $Fruit else echo $F fi 使用test:test expression,可用文件测试、字符串比较、数字比较。 (2)case语法:case word in pattern1) list1 ;; Pattern2) list2 ;; ...
The #if expression ("macros" in FEATURES in the example) is Python code, so it has Python's full comparison richness. A number of preprocessor statements are implemented: #define VAR [VALUE] #undef VAR #ifdef VAR #ifndef VAR #if EXPRESSION #elif EXPRESSION #else #endif #error ERROR_STRIN...