当我尝试登录服务器时，我很好地通过了用户名和密码屏幕(它拒绝错误的用户名/密码组合，并接受正确的用户名/密码组合(。但是，一旦我输入用户名和密码，它就会停滞片刻，并显示一条消息，显示"无法连接到服务"。
错误日志为：
Sep 24 12:22:41 ABRILPREDSVR1 kernel: [1495156.302209] ip6_tables: (C) 2000-2006 Netfilter Core Team
Sep 24 12:22:50 ABRILPREDSVR1 rserver[21509]: ERROR system error 2 (No such file or directory) [child-path=/usr/lib/rstudio-server/bin/rsession]; OCCURRED AT: rstudio::core::Error rstudio::core::system::launchChildProcess(std::string, std::string, rstudio::core::system::ProcessConfig, rstudio::core::system::ProcessConfigFilter, PidType*) /home/ubuntu/rstudio/src/cpp/core/system/PosixSystem.cpp:1433; LOGGED FROM: rstudio::core::Error rstudio::core::system::launchChildProcess(std::string, std::string, rstudio::core::system::ProcessConfig, rstudio::core::system::ProcessConfigFilter, PidType*) /home/ubuntu/rstudio/src/cpp/core/system/PosixSystem.cpp:1435
我不小心删除了 rsession 文件。现在该怎么办
同样当我运行sudo rstudio-server verify-installation它的返回错误时。
24 Sep 2019 11:03:10 [rserver] ERROR system error 2 (No such file or directory) [child-path=/usr/lib/rstudio-server/bin/rsession];
OCCURRED AT: rstudio::core::Error rstudio::core::system::launchChildProcess(std::string, std::string, rstudio::core::system::ProcessConfig, rstudio::core::system::ProcessConfigFilter, PidType*) /home/ubuntu/rstudio/src/cpp/core/system/PosixSystem.cpp:1433;
LOGGED FROM: rstudio::core::Error rstudio::core::system::launchChildProcess(std::string, std::string, rstudio::core::system::ProcessConfig, rstudio::core::system::ProcessConfigFilter, PidType*) /home/ubuntu/rstudio/src/cpp/core/system/PosixSystem.cpp:1435
同样在运行这个sudo rstudio-server status我得到这个
Sep 24 16:59:26 ABRILPREDSVR1 systemd[1]: Failed to start RStudio Server.
Sep 24 16:59:26 ABRILPREDSVR1 systemd[1]: Stopped RStudio Server.
Sep 24 16:59:26 ABRILPREDSVR1 systemd[1]: rstudio-server.service: Start request repeated too quickly.
Sep 24 16:59:26 ABRILPREDSVR1 systemd[1]: Failed to start RStudio Server.
Sep 24 16:59:26 ABRILPREDSVR1 systemd[1]: Stopped RStudio Server.
Sep 24 16:59:26 ABRILPREDSVR1 systemd[1]: rstudio-server.service: Start request repeated too quickly.
Sep 24 16:59:26 ABRILPREDSVR1 systemd[1]: Failed to start RStudio Server.
Sep 24 16:59:26 ABRILPREDSVR1 systemd[1]: Stopped RStudio Server.
Sep 24 16:59:26 ABRILPREDSVR1 systemd[1]: rstudio-server.service: Start request repeated too quickly.
Sep 24 16:59:26 ABRILPREDSVR1 systemd[1]: Failed to start RStudio Server.
Rstudio服务器昨天正在工作，之后我不小心删除了/usr/lib/rstudio-server/bin/上的rsession文件，我今天尝试在浏览器上加载rstudio服务器，它给出了错误。
我从 ubuntu 16.04 服务器卸载了 R 和其他相关组件，然后重新安装。