1. Bash If..then..fi statement if [ conditional expression ] then statement1 statement2 . fi This if statement is also called as simple if statement. If the given conditional expression is true, it enters and executes the statements enclosed between the keywords “then” and “fi”. If th...
'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...
The different types of comparison operators, logical operators, and options are used with the “if” statement for testing. The uses of the “-z” and “-n” option to test the string values using the “if” statement in Bash are shown in this tutorial. Using the “If -Z” Statement ...
https://www.cnblogs.com/ggjucheng/archive/2013/01/13/2858470.html https://ryanstutorials.net/bash-scripting-tutorial/bash-if-statements.php https://stackoverflow.com/questions/4277665/how-do-i-compare-two-string-variables-in-an-if-statement-in-bash http://www.masteringunixshell.net/qa36/bash...
Example 3: If statement in bash on less than a number In addition to-eqfor equality you can also try-lt -le -gt -getest conditions for less than, less than or equal, greater than or greater then or equal respectively. Below is a similar example with less then operator-lt: ...
Bash Scripting Tutorial Guide linuxconfig.org $ 1. 2. 3. 4. 5. 6. 7. 8. 9. 9. Bash if / else / fi statements 9.1. Simple Bash if/else statement Please note the spacing inside the [ and ] brackets! Without the spaces, it won't work!
Learn the syntax and use of the Bash declare statement with examples. Master variable declaration and attributes in Bash scripting.
Theifstatement checks if theUSERenvironment variable is equal toroot. Thethenblock runs if the condition is true, and theelseblock runs if it’s false. Step 3: Loops in Bash Bash also supports loops, which are essential when you want to repeat a task multiple times. For example, here’...
if [ condition ]; then # Code to be executed if the condition is true else # Code to be executed if the condition is false fi Q. How do I use the if-elif-else statement in a bash script to handle multiple conditions? Theif-elif-elsestatement in Bash allows you to handle multiple ...
if [ $# -gt 0 ]; then echo "has arguments" else echo "don't have arguments" fi 1. 2. 3. 4. 5. 参考: https://wiki.jikexueyuan.com/project/shell-tutorial/shell-if-else-statement.html http:///a_8629 https://www.jb51.net/article/56553.htm ...