To change directory permissions in Linux, use the following:
- chmod +rwx filename to add permissions.
- chmod -rwx directoryname to remove permissions.
- chmod +x filename to allow executable permissions.
- chmod -wx filename to take out write and executable permissions.
Permission Denied. You may see an error code such as 550, 553 or similar when trying to upload a particular file to your server which normally means that the file/folder you're trying to deploy isn't owned by the correct user or user group, or if the folder is currently in use by another process.
What is permission denied Linux error? This error comes when you try to list files or try execute the file inside the directory where you don't have sufficient permission. Since Linux operating system is very particular about its security aspect.
Change file permissions
To change file and directory permissions, use the command chmod (change mode). The owner of a file can change the permissions for user ( u ), group ( g ), or others ( o ) by adding ( + ) or subtracting ( - ) the read, write, and execute permissions.In short, “chmod 777” means making the file readable, writable and executable by everyone. chmod 775 /path/to/file. Hopefully, this article can help you understand better about the file permissions in Unix system and the origin of the magical number “777”.
- if you want to check all processes then use 'top'
- if you want to know processes run by java then use ps -ef | grep java.
- if other process then just use ps -ef | grep xyz or simply /etc/init.d xyz status.
- if through any code like .sh then ./xyz.sh status.
SH files are like batch files of Windows which can be executed in Linux or Unix. It is possible to run . sh or Shell Script file in Windows 10 using Windows Subsystem for Linux.
It is widely used by many Linux distributions and OS X. NOTE: SH files may also be used to store scripts for other shell programs such as Bourne Shell, C-Shell, and Korn Shell. Apple Terminal is a Bash shell. Open .SH files with File Viewer for Android. Programs that open SH files.
Automating command/script execution using PuTTY
- Open putty.exe.
- Enter Username and password.
- Run a shell script.
Follow these steps:
- Run nano hello.sh.
- nano should open up and present an empty file for you to work in.
- Then press Ctrl-X on your keyboard to Exit nano.
- nano will ask you if you want to save the modified file.
- nano will then confirm if you want to save to the file named hello.sh .
Run a batch file
- From the start menu: START > RUN c:path_to_scriptsmy_script.cmd, OK.
- "c:path to scriptsmy script.cmd"
- Open a new CMD prompt by choosing START > RUN cmd, OK.
- From the command line, enter the name of the script and press return.
- It is also possible to run batch scripts with the old (Windows 95 style) .
This can be done by doing the following:
- Open a terminal.
- Browse to the folder where the executable file is stored.
- Type the following command: for any . bin file: sudo chmod +x filename.bin. for any .run file: sudo chmod +x filename.run.
- When asked for, type the required password and press Enter.
Save your script and run the code using either of these methods:
- Type the script name on the command line and press Enter. For example, to run the numGenerator. m script, type numGenerator .
- Click the Run button on the Editor tab.
Bash as a scripting language. To create a bash script, you place #!/bin/bash at the top of the file. To execute the script from the current directory, you can run ./scriptname and pass any parameters you wish. When the shell executes a script, it finds the #!/path/to/interpreter .
Setting File Permissions in Command Line
There will be a Permission tab where you can change the file permissions. In the terminal, the command to use to change file permission is “ chmod “. In short, “chmod 777” means making the file readable, writable and executable by everyone.1 Answer
- make sure that ksh is correctly installed in /bin/ksh.
- for executing a script run from the command-line ./script in the directory where script exist.
- If you want to execut the script from any directory without ./ prefix, you have to add the path to your script to the PATH environment variable, add this line.
- Use chmod -R 755 /opt/lampp/htdocs if you want to change permissions of all files and directories at once.
- Use find /opt/lampp/htdocs -type d -exec chmod 755 {} ; if the number of files you are using is very large.
- Use chmod 755 $(find /path/to/base/dir -type d) otherwise.
- Better to use the first one in any situation.
644 means that files are readable and writeable by the owner of the file and readable by users in the group owner of that file and readable by everyone else. 755 is the same thing, it just has the execute bit set for everyone. The execute bit is needed to be able to change into the directory.
r (or -), indicates read permission (or otherwise), that is, the presence or absence of permission to read and copy the file. w (or -), indicates write permission (or otherwise), that is, the permission (or otherwise) to change a file.
chmod 666 file/folder means that all users can read and write but cannot execute the file/folder; chmod 777 file/folder allows all actions for all users; chmod 744 file/folder allows only user (owner) to do all actions; group and other users are allowed only to read.
The chown command allows you to use the appropriate utility to change the owner of a file or directory. As a result, the user with the name user2 will become the owner of the file1. txt and its group will become group2.
Using chmod
The chmod command takes the following general form: chmod [OPTIONS] MODE FILE The chmod command allows you to change the permissions on a file using either a symbolic or numeric mode or a reference file.You need to use ls command with -l option. File access permissions are displayed in the first column of the output, after the character for file type. ls command List information about the FILEs. If no argument is given it will use the current directory by default.
Chmod 744 (chmod a+rwx,g-wx,o-wx) sets permissions so that, (U)ser / owner can read, can write and can execute. ( G)roup can read, can't write and can't execute. ( O)thers can read, can't write and can't execute.
