test "$A" == "$B" && echo "String are equal" test "$A" -eq "$B" && echo "String are equal" 简写: [ "$A" == "$B" ] && echo "String are equal" [ "$A" -eq "$B" ] && echo "String are equal" 1. 2. 3. 4. 5. 6. 7. 练习 写一个脚本/root/bin/argsnum.sh,...
#!/bin/bash## Check if the numbers are equal or notread-p"Enter the first number: "num1 read-p"Enter the second number: "num2iftest"$num1"-eq"$num2"thenecho"$num1is equal to$num2"elseecho"$num1is not equal to$num2"fi 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 大家可以执...
the string must be found at the start of a line. */if(string[i] =='?') { substring_okay++; i++; }/* Only a closing `?' or a newline delimit a substring search string. */for(local_index = i; c =string[i]; i++) {#ifdefined (HANDLE_MULTIBYTE)if(MB_CUR_MAX >1&& rl_...
-ne 两数值不等 (not equal) -gt n1 大于 n2 (greater than) -lt n1 小于 n2 (less than) -ge n1 大于等于 n2 (greater than or equal) -le n1 小于等于 n2 (less than or equal) 5. 判定字符串的数据 test -z string 判定字符串是否为 0 ?若 string 为空字符串,则为 true test -n string...
In bash, how can I check if a string begins with some value? 检查$HOST 是否以 node 开头: case $HOST in node*) your code here esac Variable Assignment(=) string comparison(= or ==) integer and string comparison; Simple logical operators in BASH; ...
总纲:命令行里正常运行的所有指令都可以放到脚本里,而且运行结果是一样的。 同理,脚本里面的任何可以正常运行的东西都可以放在命令行运行,而且结果是一样的。 运行脚本需要先把脚本文件设成可执行文件chmod +x…
and elif. Then we'll look at a few of the "primary" operators you can leverage in a conditional statement such as = for string equality, -eq for numeric equality, and -e to check if a file exists. After that, we'll use conditional statements to create a function that asserts that ...
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...
脚本在python中产生随机的胡言乱语: import random as rd import string as st alphs = st.ascii 浏览6提问于2021-06-18得票数 1 回答已采纳 1回答 从命令替换中退出bash脚本 是否可以从使用命令替换调用的函数中退出脚本? e.g #/bin/bash function do_and_check() { ls $1 || exit } p=$(do_...
echo "both strings are equal" fi 拼接两个字符串 #! /bin/bash echo "enter 1st string" read st1 echo "enter 2nd string" read st2 c=$st1$st2 echo $c 大写 首字母大写和全部大写 #! /bin/bash echo "enter 1st string" read st1