Chmod कॅल्क्युलेटर - Linux फाइल परवानग्या ग्रिड
ऑक्टल कोड लक्षात ठेवण्याऐवजी, मालक, गट आणि सार्वजनिक साठी वाचा, लिहा आणि कार्यान्वित करा तपासा - Dokall झटपट ऑक्टल मूल्य, प्रतिकात्मक नोटेशन आणि रेडी-टू-पेस्ट chmod कमांड दर्शवते.
सामान्य प्रीसेटमध्ये वेब निर्देशिकांसाठी 755, फायलींसाठी 644, SSH कीसाठी 600 आणि केवळ-वाचनीय PEM कीसाठी 400 समाविष्ट आहेत. कॉपी करण्यापूर्वी टर्मिनल कमांड सानुकूल करण्यासाठी फाइलनाव फील्ड संपादित करा.
Frequently Asked Questions
What is chmod?
chmod (change mode) is a Unix/Linux command that sets file permissions. It controls who can read, write, and execute a file - the owner, the group, and everyone else.
What do the numbers in chmod 755 mean?
Each digit represents permissions for owner, group, and others. 7 = read(4) + write(2) + execute(1). 5 = read(4) + execute(1). So 755 means owner has full access, group and others can read and execute but not write.
What is the difference between files and directories?
Execute permission on a file means it can be run as a program. Execute on a directory means you can cd into it and list its contents. Directory permissions 755 (rwxr-xr-x) are standard; file permissions 644 (rw-r--r--) are common for regular files.
What does chmod 777 do?
777 grants read, write, and execute to everyone - owner, group, and others. This is a security risk on servers because any user can modify the file. Use 755 for directories and 644 for files unless you have a specific reason for broader access.
Symbolic vs numeric notation?
Numeric (755) is compact and common in tutorials. Symbolic (u=rwx,g=rx,o=rx) is more readable and used in chmod commands with letters: chmod u+x file adds execute for the owner. Dokall converts between both formats.