Fulltext results:
- Crash Recovery
- oot/ # boot partition to re-install grub, you need to chroot mount -o bind /dev /mnt/dev mount ... nstall /dev/sdb To exit the recovery console you need to set boot mode to normal and wait 10min until "... ===== SoYouStart / OVH Root Server ===== **You need to setup your ssh key in the webmanager to enter ... already. To repair what is broken, you probably need to change root into that system: chroot /mnt
- btrfs @linux:filesystems
- ====== btrfs ====== * needs a non-btrfs boot partition - grub2 doesn't handle brtfs compression, etc.... important notes ===== btrfs is really tricky and needs a lot of maintaince: * balance weekly * use... t the space. Used shows the data-usage space. you need to add metadata usage. btrfs fi df /home/ se... removing a device (even the missing one) you may need to add a new one. For example if you have a raid1
- PHP @linux:webserver
- if a phpfpm "www" pool process is running You need to edit your vhosts to use the new pool. Replace ... x_spare_servers = 25 Test how much RAM your site needs. This is the max, not the regular used memory. M... a new one in: /etc/php/7.0/fpm/pool.d/ You only need to adjust the socket line, to point to /var/run/p... .4 in Debian Buster / SURY REPO ===== php7.4-fpm needs systemd :( Add Sury Repo: apt -y install lsb-
- LXC @linux:virtualization
- libvirt and IPV6 ==== **Deprecated! - if you not need DHCP, use the simple bridge method without libvir... you ping sometimes in <-> out -> the neighbouring needs to be build up and stales after a short time *... nning containers (mysql may get inconsitent) you need to create container with option -B btrfs!! lx... gnized it * apparmor: mounts security-fs, would need to disable drop caps. bad idea * kmod * lm-se
- Bootloader @linux:filesystems
- ta anyway you like (as root user): 1. **rsync** needs params and data must be excluded, (but works f&f... UUIDs in fstab** of the new system. \\ The UUIDs need to be replaced by the new UUIDs in **/mnt/newsys/... \\ ** initramfs ** the step after the bootloader needs all (fs, rais,..) modules to mount root, check: ... ** RAID ** if you changed your raid setup, you need to update initramfs: dpkg-reconfigure mdadm m
- mySQL @linux:databases
- setup does not require all users to use ssl, you need to update your mysql.users with REQUIRE_SSL!** First generate all certs. You need to adjust days and set some hostnames (seems unim... safe in debian usually respawns it immediatly (no need for restarts by monit) watch memory usage: wa
- SSH @linux:network
- o login on a remote machine without password, you need to add the public key to the file **~/.ssh/author... xecuted - no matter what your script says!!** You need one line for each rsync command! More restrictio... ot@re.mo.te.IP in /etc/ssh/sshd_config you only need to AllowTcpForwarding: X11Forwarding no Allo
- Password Manager
- way easier to setup and use. In Ubuntu you only need to add this Repo to get the latest version: https... p, the integration works very well. If you don't need the very latest version, just install it from deb... p4.0-cil mono-dmcs mono-mcs xsel xdotool IF you need the latest version, it is best to use additional
- Replication @linux:databases:mysql
- mance is as slow as the slowest node!! all writes need to be confirmed, because of syncronous replicatio... ght be writes on server A in between so the slave needs to catch up from the backups' position:** cat... ries. During that time Write queries are blocked. Need to test, if the import works with binlog postion
- BIOS Upgrade @linux:debian_install
- OS does not allow IO memory map by default. User needs to add "iomem=relaxed" to grub boot option to en... ~5min or may nees a HARD REBOOT! The latest BIOS needs a HARD REBOOT!** **If IMPI Java Concole is open
- PXE netboot @linux:debian_install
- etwork. Just switch the bios to PXE netboot. You need dnsmasq, it includes a tftpd server, which serves... d ===== dnsmasq includes a tftp server, you just need to serve the pxe boot files from there. For debia
- Security
- , use "CHAIN = FORWARD" * to activate mail, you need to set the default action to: "action = %(action_... * If you have redirected ports via iptables, you need to block both, like port = 3306,33306 * [my
- Graphics Driver @linux:system_config
- t remove --purge nvidia-* **For older cards, you need older drivers!** 304.135 OR Version 340.102 - de
- Synergy @linux:network
- ou can even share all of your clipboards. All you need is a network connection. Synergy is cross-platfor
- Linux on Windows Atom Tablets @linux:machines
- hen the system is installed - before reboot - you need to chroot into the fresh system and install 32-bi