But how could I change the defaults options in my yocto recipe? I have no idea where to find the default mount options definition in the recipe. I'm able to manipulate the /etc/fstab file manually. I will change the default mounting option to rw,sync,noatime,nodelalloc,barrier=1,commit=1,data=journal. If you don't state any options, the default options in Ubuntu are rw,relatime. When you use contradicting options (like defaults,noexec ), the later will take precedence. dev/mmcblk0p4 /data ext4 rw,relatime 0 0 As per man mount (if you use the option defaults ): defaults Use default options: rw, suid, dev, exec, auto, nouser, and async. The defaults option for mounting results in the following mount configuration ( cat /proc/mounts): /dev/root / ext4 rw,relatime 0 0 dev/mmcblk0p4 /data ext4 defaults,x-systemd.before=network-pre 0 1 Step 2: gain root in a terminal, with sudo -s and open the fstab file: sudo -s nano /etc/fstab.Step 3: write out your mount line. The file system which I use is ext4 and the /etc/fstab file contains the following lines (snipped): /dev/root / auto defaults 1 1 Follow the block device ID to the hard drive partition you wish to mount, and copy the UUID number next to it.It is based on 'dunfell' (3.1.11) branch of yocto and using the linux mainline kernel 5.10.57. This file contains 1 line with 6 fields for each. I/O size (minimum/optimal): 512 bytes / 512 bytes The file systems and their mount points in the directory tree are configured in the file /etc/fstab. Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytesĭevice Boot Start End Sectors Size Id Type rd.fstab is honored only by the initial RAM disk (initrd) while fstab is honored by both the main system and the initrd.
Fstab defaults generator#
atime / noatime / relatime / strictatime (Linux-specific) The Unix stat structure records when files are last accessed ( atime ), modified (mtime), and changed ( ctime ). If 'no', causes the generator to ignore any mounts or swap devices configured in /etc/fstab. owner (Linux-specific) Permit the owner of device to mount. See also the descriptions of the relatime and strictatime mount options. atime Do not use the noatime feature, so the inode access time is controlled by kernel defaults. Sector size (logical/physical): 512 bytes / 4096 bytes Default file system mount attributes can be overridden in /etc/fstab. The files /etc/fstab, /etc/mtab and /proc/mounts The file /etc/fstab (see fstab(5).
![fstab defaults fstab defaults](http://4.bp.blogspot.com/-BE-X4vMc058/T7n_2TqpIUI/AAAAAAAAARE/y6mAiCYJBtE/s1600/fstab.png)
Disk /dev/sda: 931.51 GiB, 1000204886016 bytes, 1953525168 sectors If you want to use different default storage directories for the core IBM. sdb is my SSD and boot partition with all the Linux files. I paste my fdisk -l here, maybe you can see if there’s something off. Basic file system independent options are: defaults use default options: rw, suid, dev, exec, auto. Each filesystem is described on a separate line fields on each line are separated by tabs or spaces. Wrapping up Hopefully, you now have a better grasp of the purpose of /etc/fstab and can make sense of what is shown on your system. fstab is only read by programs, and not written it is the duty of the system administrator to properly create and maintain this file.
![fstab defaults fstab defaults](https://www.howtogeek.com/wp-content/uploads/2019/10/14-5.png)
If i add this : er,oup,jqfmtvfsv0 (from this part of the tutorial) The Tutorial said: Edit /etc/fstab.
![fstab defaults fstab defaults](https://images2018.cnblogs.com/blog/806469/201803/806469-20180316131856258-1980359577.png)
![fstab defaults fstab defaults](https://i.stack.imgur.com/lFUbS.jpg)
My example using defaults 0 0 gives read/write access. In my 1st post, its my original fstab file. Editing is possible by opening a terminal and doing: In KDE: kdesu kwrite /etc/fstab In Gnome: gnomesu gedit /etc/fstab You can also use super user file. I have a boot partition with its flag on. This defaults to noexec for all user accounts. Fstab requires you have root privileges to edit it. But somehow my motherboard is still putting a black screen asking for a bootable device to be inserted.