Linux bash if or and
Nettet13. apr. 2024 · 到此这篇关于Linux bash:./xxx:无法执行二进制文件报错的文章就介绍到这了,更多相关Linux 无法执行二进制文件 内容请搜索软件开发网以前的文章或继续浏 … NettetThe accepted answer is good but since you're using bash I'll add the bash solution: if [ [ "$fname" == "a.txt" "$fname" == "c.txt" ]]; then This is documented in the bash …
Linux bash if or and
Did you know?
Nettet6. des. 2011 · linux; bash; Share. Improve this question. Follow edited Jul 8, 2024 at 3:49. tripleee. 172k 32 32 gold badges 264 264 silver badges 310 310 bronze badges. asked … NettetIf you are using the bash exit code status $? as variable, it's better to do this: if [ $? -eq 4 -o $? -eq 8 ] ; then echo "..." fi Because if you do: if [ $? -eq 4 ] [ $? -eq 8 ] ; then The …
Nettet2 timer siden · I am trying to write a bash alias to execute a command, and echo it as well. Tried various methods mentioned in StackOverflow and other places, but nothing … Nettet27. jun. 2024 · 2. Add the following code to your bash_if_else_demo.sh file, save the changes, and close the file. The code below prints a message asking for the user’s …
Nettet3. jul. 2024 · Bashで使える演算子には && (AND演算子) と (OR演算子) があります。 使い方は if [ … ] && [ … ] です。 また、testコマンドの引数では -a (AND条件) と -o … NettetThe description of the script is given below: Firstly, two variables “a” and “b” are initialized with values 4 and 2. After that, the echo statements are performed in addition to the …
Nettet5. mai 2016 · If you are using a shell derived from ksh (such as bash) you can use the built-in test operator [ [: [ [ "$string1" != "$string2" && "$string3" != "$string4" $bool1 …
Nettet29. jul. 2024 · IF statements are used in making decisions in bash scripting. When an IF statement is introduced in a bash script, it is intended to check for certain conditions … dually diagnosed residential facilityNettet19. jun. 2015 · if ( [ "$ ( (a != 0 b != 100))" -ne 0 ]); then You probably shouldn't use that form anyway if the content of the variables is not under your control as that would be an … dually drawingsNettetConclusion. In the Bash shell script, $$ is a special variable that represents the process ID (PID) of the current shell. This means that $$ expands to the PID of the Bash process … common house house mothNettetfor 1 dag siden · Regular Linux files are files that may include text, data, information, piece of code or program instructions. This flag is widely used by Bash programmers to make … dually diagnosed treatmentNettet4. apr. 2013 · Not the question you actually asked, but... You told the user to enter "yes" or "no" but only test for y or n - sure, you gave them a hint but users are hint-resistant. dually dodge challengerNettetNo need to quote variable expansions inside [ [ ]] or ( ( )) - Bash doesn't do word splitting or globbing in these contexts. Inside ( ( )), there is no need for a $ behind variable … dually drivers seriesNettet22. nov. 2016 · Linux if then else allows you to build a branch in a script and create conditional logic (so it is not technically a command, but a keyword). Purpose - Learn … dually drivers