Выполнив ps aux можно получить доступ к процессам всей системы, а не только chroot. Это может являться угрозой безопасности. chroot стоит использовать для сборки пакетов под разные системы на одном хосте или для тестирования какого-либо ПО, также он нужен чтобы запуститься со съемного носителя когда на основной машине неработоспособен загрузчик.
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Introduction to Linux — A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter. For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author’s experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
I’m learning through this tutorial to learn bash scripts to automate a few tasks for me. I’m connecting to a server using putty.
The script, located in . /Documents/LOG , is:
And I executed the following for read/write/execute permissions
Then, when I enter ./my_script , I’m getting the error given in the title.
Some similar questions wanted to see these, so I think they might help:
I tried adding current directory to PATH , but that doesn’t work..
11 Answers 11
I have seen this issue when creating scripts in Windows env and then porting over to run on a Unix environment.
Try running dos2unix on the script:
Or just rewrite the script in your Unix env using vi and test.
Unix uses different line endings so can’t read the file you created on Windows. Hence it is seeing ^M as an illegal character.
If you want to write a file on Windows and then port over, make sure your editor is set to create files in UNIX format.
In notepad++ in the bottom right of the screen, it tells you the document format. By default, it will say DosWindows . To change it go to