Bash - (Return|Exit) (Value|Status)

Bash Liste Des Attaques Ovh


The return status (also known as Exit Status of Exit Code) of a simple command is its exit status as provided by:



? is a special parameter that expands to the status of the most recently executed foreground pipeline.

echo $?


/usr/bin/somecommand || /bin/true



if [ ${RESULT} -ne 0 ];
    echo -e "\nLast command has failed."
    echo -e "\nLast command has succeeded."

One liner

[ "$?" -eq 0 ] && echo success  || echo failure

Discover More
Bash Liste Des Attaques Ovh
Bash - Arithmetic Expression

arithmetic in bash part of compound expression . Counter Simple addition where let is the let command If the value of the expression is: non-zero, the return status is 0; otherwise ...
Bash Liste Des Attaques Ovh
Bash - Break

A flow command that exit from within: a for, while, until, or select loop. where: n is the break level. n must be ≥ 1. If n is greater than the number of enclosing loops, all...
Bash Liste Des Attaques Ovh
Bash - Colon (:) Builtin command

The : builtin command does nothing beyond: expanding its arguments and performing any specified redirections. A zero exit code is returned.
Bash Liste Des Attaques Ovh
Bash - Conditional Expression

A predicate or boolean expression is known in Bash as a Conditional Expression. It is a command that returns an exit status of 0 or 1. The conditional expression is part of the compound expression. ...
Bash Liste Des Attaques Ovh
Bash - Exit Builtin command

exit is a builtin command and cause the shell to exit with a given exit status. n is the exit status of n. If n is omitted,the exit status is that of the last command executed. A function...
Bash Liste Des Attaques Ovh
Bash - For Statement

The for statement in bash forloop statements of Bash With a file. Locate returns a list of file in one line separated by a space. This code use then the loop array loop with the Bash version...
Bash Liste Des Attaques Ovh
Bash - Hash (Builtin command)

For each name, the full file name of the command is determined by searching the directories in and remembered. -p: no path search is performed, and filename is used as the full file name of the command....
Bash Liste Des Attaques Ovh
Bash - If then else

if execute conditionally a block with a list of command based on the exit status of a list of command control operators The if list. The command list) is executed (Generally there is one or more...
Bash Liste Des Attaques Ovh
Bash - Pipeline

This article talks the syntax of a Shell Pipeline in Bash All command(s) in a pipeline are executed: in parallel. and started in a subshell (meaning that the environment is not passed along the...
Bash Liste Des Attaques Ovh
Bash - Return - (Function|Shell) exit

Return is a bash builtin function that causes to update the exit status specified by n. Return is intended to be used only for signaling errors, not for returning the results of function. If used:...

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