99 lines
2.1 KiB
Markdown
99 lines
2.1 KiB
Markdown
shopt
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===
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显示和设置shell操作选项
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## 补充说明
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**shopt命令** 用于显示和设置shell中的行为选项，通过这些选项以增强shell易用性。shopt命令若不带任何参数选项，则可以显示所有可以设置的shell操作选项。
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### 语法
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```shell
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shopt(选项)(参数)
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```
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### 选项
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```shell
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-s：激活指定的shell行为选项；
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-u：关闭指定的shell行为选项。
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```
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### 参数
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shell选项：指定要操作的shell选项。
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### 实例
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使用shopt命令显示当前所有可以设置的shell操作选项，输入如下命令：
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```shell
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shopt #输出所有可以设置的shell操作选项
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autocd off
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cdable_vars off
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cdspell off
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checkhash off
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checkjobs off
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checkwinsize on
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cmdhist on
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compat31 off
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compat32 off
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compat40 off
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compat41 off
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compat42 off
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compat43 off
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complete_fullquote on
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direxpand off
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dirspell off
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dotglob off
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execfail off
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expand_aliases on
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extdebug off
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extglob off
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extquote on
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failglob off
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force_fignore on
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globasciiranges off
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globstar off
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gnu_errfmt off
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histappend on
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histreedit off
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histverify off
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hostcomplete on
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huponexit off
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inherit_errexit off
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interactive_comments on
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lastpipe off
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lithist off
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login_shell on
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mailwarn off
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no_empty_cmd_completion off
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nocaseglob off
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nocasematch off
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nullglob off
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progcomp on
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promptvars on
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restricted_shell off
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shift_verbose off
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sourcepath on
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syslog_history off
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xpg_echo off
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```
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如图上所示，选项"cdspell"的状态为"off"，即关闭cd拼写检查选项。现在，可以使用shopt命令将其开启，输入如下命令：
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```shell
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shopt -s cdspell #开启cd拼写检查
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```
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执行上面的命令后，该选项的状态将变为"on"，即开启状态。可以再次通过该命令显示一下shell操作选项即可，输出信息如下：
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```shell
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cdspell on #开启cdspell选项
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```
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用户可以通过实际执行cd命令检查该选项是否被成功开启。
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