0o5400

0o5400 is an octal numeral, a base-8 representation commonly used in computing for numeric literals and file permission bits. Interpreted as a decimal value, 0o5400 equals 2816; in hexadecimal it is 0x0B00. In programming languages that use an 0o prefix for octal numbers, such as Python, 0o5400 is read as the integer value 2816.

In Unix-like systems, a four-digit octal value such as 05400 (often written with a leading zero) can represent a file mode. The digits are read as: special permissions, owner permissions, group permissions, and other permissions. For 5 4 0 0, the breakdown is:

- Special bits: 5, which combines setuid (4) and sticky (1).

- Owner permissions: 4, which means read permission only.

- Group permissions: 0 (no permissions).

- Other permissions: 0 (no permissions).

As a file mode, 05400 would indicate that the setuid and sticky bits are set, while the owner has only read access and neither group nor others have access. In practice, the setuid bit only has an effect when the file is executable; since the owner lacks execute permission in this mode, the setuid bit would not enable privilege escalation for execution. The sticky bit is most meaningful on directories, where it restricts deletion of contained files by non-owners; on regular files its effect is typically limited or ignored on many systems.

0o5400 can also appear in code as an octal literal, independent of file permissions, representing the same numeric value in decimal and hexadecimal forms.