Difference between revisions of "$?"
Jump to navigation
Jump to search
| (2 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
<code>[[echo $?]]</code> prints the [[exit status]] of the last executed command in the terminal. The exit status is a numeric value that indicates whether the command completed successfully or encountered an error. A value of [[0]] indicates success, while non-zero values indicate an [[error]]. | <code>[[echo $?]]</code> prints the [[exit status]] of the last executed command in the terminal. The exit status is a numeric value that indicates whether the command completed successfully or encountered an error. A value of [[0]] indicates success, while non-zero values indicate an [[error]]. | ||
| − | |||
== Examples == | == Examples == | ||
| Line 11: | Line 10: | ||
1 | 1 | ||
| − | + | [[apt -qqq update -y && apt -qqq upgrade -y; echo $?]] | |
| − | [[apt -qqq update -y | ||
== Related == | == Related == | ||
| Line 20: | Line 18: | ||
== See also == | == See also == | ||
| + | * {{exit}} | ||
* {{set}} | * {{set}} | ||
* {{Bash}} | * {{Bash}} | ||
[[Category:Bash]] | [[Category:Bash]] | ||
Latest revision as of 06:54, 7 June 2024
echo $? prints the exit status of the last executed command in the terminal. The exit status is a numeric value that indicates whether the command completed successfully or encountered an error. A value of 0 indicates success, while non-zero values indicate an error.
Examples[edit]
mkdir -p /path/to/root/in/macos mkdir: cannot create directory ‘/path’: Read-only file system
-p, --parents makes parents directories if needed and no error if existing echo $? 1
apt -qqq update -y && apt -qqq upgrade -y; echo $?
Related[edit]
See also[edit]
exit, set, exit 0, $?set, unset, set -o, set -x, set -e, set +e, set -E, set +b, set -u, $?, exit, return, trap, PostgreSQL SETBash [ -c ],alias,&&, Bash history, Autocompletion,set,unset,export,.bash_aliases, .bashrc and .bash profile,PS1,echo,brace expansion, Function,shopt,trap,set -e,source,PATH,complete,disown,.hushlogin,.bashrc,builtin,eval,set,$PATH,$HOME,TZ,.profile,-e, -i,Builtin (Bash),mapfile,~, return (Bash), for, until,declare, dirname, basename, functions.sh, Bash arithmetic expansion,shift, bash --rcfile, readonly, $1, $@
Advertising:
