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(If n is omitted, the exit status is that of the last command executed. ) 格式:$? 上一个命令的退出码。 格式:trap "commands" EXIT 退出时执行commands指定的命令。( A trap on EXIT is executed before the shell terminates.) 退出码(exit status,或exit code)的约定: 0表示成功(Zero - Success...
...不过毕竟是内测版本,还存在很多bug:使用top命令会使整个系统死机,使用apt-get安装emacs会在成功之前挂起一次。但是总体来说,作为早期的测试版本还是比较出色的。...微软承诺将在以后修复这个bug,这样用户就会以用户的权限登录,可以使用sudo命令获取超级用户的权限。 在整合开源生态系统的开发工具方面,微软要做的还有...
If you want to get the exit code To get the exit code of any command, use the “$?” variable alongside the echo command or printf command. Example: The “0” return code indicates that the command was successful. It implies that the file “intro.txt” exists and the Linux/UNIX syste...
echo"Unknown option $1"exit1;;*)#对于所有其他非选项参数(即位置参数),将它们逐一添加到POSITIONAL_ARGS数组中,POSITIONAL_ARGS+=("$1")# 保存位置参数 shift;;esac done set--"${POSITIONAL_ARGS[@]}"# 将数组里的参数设置为当前 shell 的位置参数 ...
GET请求API # GET 请求 curl --location 'https://gateway.xxx.cn/xxx-service/v0/internal/file/download/cdhhjj4b-8e41-4659-90d2-efc240f3232f' \ --header 'agentCode: Baidu' POST请求API # POST 请求 curl --location 'https://gateway.xxx.cn/bdp/public/api/V2/data2api/xxx-digitalTwin...
shell的return(没写return的函数, return的值就被称为status code? ) 类似python等语言的return, echo对标print Common options (GNU Coreutils) ‘-d file’ ‘-f file’ 这俩没有相互包含关系 好多参数 -n 判断是否非空 ${#var}will get the length of $var The test command doesn't understand ==,...
/bin/bashset-eSCRIPT_DIR="$( cd "$( dirname"${BASH_SOURCE[0]}")" && pwd )"# get UBUNTU_CODENAME, ROS_DISTRO, REPO_DIR, CATKIN_DIRexportUBUNTU_CODENAME=$(lsb_release -s -c)case$UBUNTU_CODENAME intrusty)exportROS_DISTRO=indigo;;xenial)expo...
When you execute a command or run a script, you receive an exit code. An exit code is a system response that reports success, an error, or another condit...
if (!killed && exitCode != 0) { if (exitCode == 65) { tracker.getTaskTrackerInstrumentation().taskFailedPing(t.getTaskID()); } throw new IOException("Task process exit with nonzero status of " + exitCode + "."); } } } catch (FSError e) { ...