How to find the return value of last executed command in UNIX
1 Answer Sorted by 53 You can use the shell variable Such as true echo 0 false echo 1 Share Improve this answer Follow edited Feb 17 2018 at 21 48
Bash Get the Exit Status Code of the Last Command, In a Bash shell the exit status a k a exit code or return code of the last command you ran is stored in the special parameter In a terminal session you can print out that value using echo Copy echo As an example let s run the type command and then get its exit status
Bash Which is the best way to check return result Unix Linux
The exit status of a function is the exit status of the last executed command in the function so an explicit return is seldom needed seldom with an explicit return value at least A function that checks whether a directory exists should not create any directories Better call it create dir if needed There s an error in result 0
Reusing output from last command in Bash Stack Overflow, Reusing output from last command in Bash Ask ion Asked 9 years 5 months ago Modified today Viewed 273k times 269 Is the output of a Bash command stored in any register E g something similar to capturing the output instead of the exit status I could assign the output to a variable with output command but that s more typing bash
Bash Return last command executed in shell script Super User
Bash Return last command executed in shell script Super User, This way also works great for bash v4 set she bang as interactive and do not forget about set o history like chepner mentioned PS history tail n2 head n1 doesn t equal to the last command it is command before last one Note if last or prelast commands were multiline it won t return the correct result
Linux Command Execution Bypass
Making Linux shell prompt show last return value Super User
Making Linux shell prompt show last return value Super User 3 Answers Sorted by 11 It seems bash is Xubuntu s default shell Edit bashrc or bash profile depending on your system configuration and look for a line starting with PS1 This line sets your prompt To add the last command s return value add the following to that line echo n
Shell
When a function returns a value it sets the exit status of the function to the value of the last executed command The exit status is a numerical value that indicates whether a command succeeded or failed A value of 0 indicates success while a non zero value indicates failure Using Bash Functions to Get Return Values How to Use Bash Functions to Get Return Values in Linux. When a bash function ends its return value is its status zero for success non zero for failure To return values you can set a global variable with the result or use command substitution or you can pass in the name of a variable to use as the result variable The examples below describe these different mechanisms The return command is not necessary when the return value is that of the last command executed Example Create a shell script called isroot sh as follows bin bash version 1 0 Purpose Determine if current user is root or not is root user
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