Read-only

• Windows Unified Write Filter (UWF)

• PostgreSQL (predefined roles): GRANT pg_read_all_data TO xxx;
• PostgreSQL read only user

Kernel

• kernel: Write protecting the kernel read-only data: 20480k

Filesystems

• read-only file system error and kernel: EXT4-fs (sda2): Remounting filesystem read-only

Oct 12 13:01:20 SERVER cloud-init[1605]: OSError: [Errno 30] Read-only file system: '/var/lib/cloud/data'
Oct 12 12:55:03 SERVER swapon[449]: swapon: /swap.img: swapon failed: Read-only file system

AWS IAM

• AWS ReadOnlyAccess policy

AWS S3

• AWS S3 Object Lock (2018)

Elasticsearch

all indices on this nodes will be marked read-only

Related terms

• mount and Errors=remount-ro option
• AWS SelfManageCredentials
• AWS S3 Object Lock
• Immutable Storage
• view
• read_only

See also

• File systems: mount, umount, findmnt, find, swapon, swapoff, UUID, blkid, mount options: /etc/fstab, udisksctl mount, guestmount, /proc/mounts, fstrim, systemd-mount, defaults
• Microsoft Windows: Windows 10, Windows 11, Windows Server, Windows IoT, Windows Server containers, RDP, Windows Update, Windows Defender, Windows Unified Write Filter (UWF), ReFS, Start-Service, Stop-Service, Set-Service, DISM, SFC, systeminfo, Microsoft Hyper-V, WSL, Windows Terminal, Windows Subsystem for Linux (WLS), Windows Server 2022, PowerShell, logoff, query user, WLMS, File explorer, Copy-Item, BitLocker, Cmdlet, choco, scoop, Windows VSS