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Martin Hope
the_nuts
Asked: 2021-06-02 12:26:19 +0800 CST
  • 1

I have this issue on multiple ubuntu 18.04 servers.

During a regular apt update && apt upgrade I get this error:

Setting up grub-efi-amd64-signed (1.167~18.04.1+2.04-1ubuntu44) ...
Installing for x86_64-efi platform.
grub-install: error: cannot find EFI directory.
dpkg: error processing package grub-efi-amd64-signed (--configure):
installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1

I'm on a server, I don't use grub and I never heard of EFI, I didn't change any of its settings as far as I know.

I have /dev/md1 mounted on /boot, and I see I have a directory /boot/efi but it's empty.

How can I fix this issue?

fdisk -l:

Disk /dev/sda: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: F4BBD515-6E5E-4152-AD41-6D80A4A69583

Device          Start        End    Sectors    Size Type
/dev/sda1          40       2048       2009 1004.5K BIOS boot
/dev/sda2        4096 3905976319 3905972224    1.8T Linux RAID
/dev/sda3  3905976320 3907022847    1046528    511M Linux swap


Disk /dev/sdb: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 2C2D425C-9EAF-472D-8820-068D587A47D0

Device          Start        End    Sectors    Size Type
/dev/sdb1          40       2048       2009 1004.5K BIOS boot
/dev/sdb2        4096 3905976319 3905972224    1.8T Linux RAID
/dev/sdb3  3905976320 3907022847    1046528    511M Linux swap


Disk /dev/md2: 1.8 TiB, 1999857713152 bytes, 3905972096 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

fdisk -l, second server:

Disk /dev/sda: 223.6 GiB, 240057409536 bytes, 468862128 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x762b7381

Device     Boot     Start       End   Sectors   Size Id Type
/dev/sda1  *         4096   1050623   1046528   511M fd Linux raid autodetect
/dev/sda2         1050624 467808255 466757632 222.6G fd Linux raid autodetect
/dev/sda3       467808256 468854783   1046528   511M 82 Linux swap / Solaris


Disk /dev/md2: 445.1 GiB, 477958766592 bytes, 933513216 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 524288 bytes / 1048576 bytes


Disk /dev/md1: 511 MiB, 535756800 bytes, 1046400 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/sdb: 223.6 GiB, 240057409536 bytes, 468862128 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x41167758

Device     Boot     Start       End   Sectors   Size Id Type
/dev/sdb1  *         4096   1050623   1046528   511M fd Linux raid autodetect
/dev/sdb2         1050624 467808255 466757632 222.6G fd Linux raid autodetect
/dev/sdb3       467808256 468854783   1046528   511M 82 Linux swap / Solaris
grub ubuntu-18.04
Martin Hope
the_nuts
Asked: 2018-12-11 09:38:15 +0800 CST
  • 1

I installed on a new server with Ubuntu 18.04 Nginx mainline, current version nginx/1.15.6

Whichever way I try to reload nginx, it gives no error but it doesn't work, the configuration isn't reloaded:

# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
# 
# service nginx reload
# /etc/init.d/nginx reload
[ ok ] Reloading nginx configuration (via systemctl): nginx.service.
# nginx -s reload
# systemctl reload nginx

If I do restart instead, it works but with some seconds of downtime that I want to avoid. What could be the issue?

ubuntu
Martin Hope
the_nuts
Asked: 2018-11-29 03:41:53 +0800 CST
  • 0

I have a server that comes with a softRaid of 2x450gb nvme disks. Since all my data is backupped, I don't need the raid and I want to use the full space instead.

From the hosting (OVH) control panel I selected to format only one disk, and what I got was:

~# fdisk -l
Disk /dev/nvme0n1: 419.2 GiB, 450098159616 bytes, 879097968 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 2791B286-8A53-4943-A74D-A3E86200E692

Device             Start       End   Sectors   Size Type
/dev/nvme0n1p1      2048   1048575   1046528   511M EFI System
/dev/nvme0n1p2   1048576   2095103   1046528   511M Linux filesystem
/dev/nvme0n1p3   2095104 878039039 875943936 417.7G Linux filesystem
/dev/nvme0n1p4 878039040 879085567   1046528   511M Linux swap


Disk /dev/nvme1n1: 419.2 GiB, 450098159616 bytes, 879097968 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 2ADB5903-8173-44BA-907C-945EFA2DD7ED

Device         Start     End Sectors  Size Type
/dev/nvme1n1p1  2048 1048575 1046528  511M EFI System

so I created a partition on nvme1 and formatted it:

root@web08:~# fdisk /dev/nvme1n1

Welcome to fdisk (util-linux 2.31.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.


Command (m for help): F
Unpartitioned space /dev/nvme1n1: 418.7 GiB, 449561271808 bytes, 878049359 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

  Start       End   Sectors   Size
1048576 879097934 878049359 418.7G

Command (m for help): n
Partition number (2-128, default 2):
First sector (1048576-879097934, default 1048576):
Last sector, +sectors or +size{K,M,G,T,P} (1048576-879097934, default 879097934):

Created a new partition 2 of type 'Linux filesystem' and of size 418.7 GiB.

Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Syncing disks.

root@web08:~# mkfs -t ext4 /dev/nvme1n1p2
mke2fs 1.44.1 (24-Mar-2018)
Discarding device blocks: done
Creating filesystem with 109756169 4k blocks and 27443200 inodes
Filesystem UUID: 57d73a12-ad8b-4bf3-8daf-ca0081b0b17e
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
        4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
        102400000

Allocating group tables: done
Writing inode tables: done
Creating journal (262144 blocks): done
Writing superblocks and filesystem accounting information: done

Now, if I reboot the server it doesn't boot anymore, without even putting the new partition in fstab (if I put it in fstab and I launch mount -av it mounts the partition without any problem)

What can it be?

hard-drive
Martin Hope
the_nuts
Asked: 2017-07-20 09:45:55 +0800 CST
  • 1

When I start/restart the mysql service, I always see this row in the log:

2017-07-19T17:35:02.379166Z 5 [Note] Access denied for user 'root'@'localhost' (using password: NO)

What is it trying to do? And how can I set the user/password/host for this operation? (it should be 127.0.0.1 and not localhost because I have skip_name_resolve=1)

I already have a .my.cnf in my home folder, but mysql is running under the mysql user, so should I create a .my.cnf file in the mysql home? Would this be safe?

I'm using a Percona Server 5.7

mysql
Martin Hope
the_nuts
Asked: 2017-07-18 23:26:53 +0800 CST
  • 2

I have a Ubuntu 16.04.2 server with a /64 block of IPv6s.

If I add the block, like this:

ip addr add 2001:41d0:xxx:yyy::/64 dev eth2

only the first one works:

$ curl -g http://[2001:41d0:xxx:yyy::]/
<!DOCTYPE html>...
$ curl -g http://[2001:41d0:xxx:yyy::1]/
curl: (7) Failed to connect to 2001:41d0:xxx:yyy::1 port 80: Connection timed out

If I add the others one by one, they work:

ip addr add 2001:41d0:xxx:yyy::1/128 dev eth2

What I am doing wrong?

The block is also in /etc/network/interfaces:

iface eth2 inet6 static
    address 2001:41d0:xxx:yyy::
    netmask 64
networking
Martin Hope
the_nuts
Asked: 2017-03-26 16:33:16 +0800 CST
  • 6

When I try to run mysqldump on a Percona Server 5.7.17-12, I get this error:

# mysqldump -u backups -pxxxx -h 127.0.0.1 --single-transaction --quick dbname
mysqldump: [Warning] Using a password on the command line interface can be insecure.
-- MySQL dump 10.13  Distrib 5.7.17-12, for debian-linux-gnu (x86_64)
--
-- Host: 127.0.0.1    Database: dbname
-- ------------------------------------------------------
-- Server version       5.7.17-12

/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8 */;
/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
/*!40103 SET TIME_ZONE='+00:00' */;
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
/*!50112 SELECT COUNT(*) INTO @is_rocksdb_supported FROM INFORMATION_SCHEMA.SESSION_VARIABLES WHERE VARIABLE_NAME='rocksdb_bulk_load' */;
/*!50112 SET @save_old_rocksdb_bulk_load = IF (@is_rocksdb_supported, 'SET @old_rocksdb_bulk_load = @@rocksdb_bulk_load', 'SET @dummy_old_rocksdb_bulk_load = 0') */;
/*!50112 PREPARE s FROM @save_old_rocksdb_bulk_load */;
/*!50112 EXECUTE s */;
/*!50112 SET @enable_bulk_load = IF (@is_rocksdb_supported, 'SET SESSION rocksdb_bulk_load = 1', 'SET @dummy_rocksdb_bulk_load = 0') */;
/*!50112 PREPARE s FROM @enable_bulk_load */;
/*!50112 EXECUTE s */;
/*!50112 DEALLOCATE PREPARE s */;
mysqldump: Couldn't execute 'SELECT COUNT(*) FROM INFORMATION_SCHEMA.SESSION_VARIABLES WHERE VARIABLE_NAME LIKE 'rocksdb\_skip\_fill\_cache'': The 'INFORMATION_SCHEMA.SESSION_VARIABLES' feature is disabled; see the documentation for 'show_compatibility_56' (3167)

Why mysqldump is trying to use that deprecated variable? Is there any way to fix it beside enabling show_compatibility_56 (I would prefer not doing it and also not restarting the server)

mysql
Martin Hope
the_nuts
Asked: 2017-02-08 05:38:27 +0800 CST
  • 2

I don't know if this depends on Wordpress, Nginx, or what else... But I have this problem:

A wp site uses categories names as permalinks, like site.com/catname/. Those name are in arabic.

The url looks something like this:

https://exampe.com/سكس-hd/

which can be translated in 2 different ways:

https://example.com/%d8%b3%d9%83%d8%b3-hd/ https://example.com/%D8%B3%D9%83%D8%B3-hd/

the first one, with lowercases, works, but the second gives a 404. This creates many issues, also in Google indexing.

How can I make the 2 requests point to the same content?

this

$_SERVER['REQUEST_URI'] = strtolower($_SERVER['REQUEST_URI']);

In the index.php fixes the issue but it's a bad workaround

nginx wordpress ubuntu-16.04
Martin Hope
the_nuts
Asked: 2016-04-17 11:17:31 +0800 CST
  • 1

I have a VPS which hosts different domains, and I'm trying to setup SMTP with postfix, so the users can send emails via SMTP from addresses like:

[email protected]
[email protected]
[email protected]

I managed to configure tsl, sasl etc. but I can't find how to configure the smtp accounts... All the guides I can find use a UNIX user to login, which is not what I'm looking for...

To receive mails, I'm currently using the virtual_alias_maps to forward incoming mails to the respective owner mailbox.

email postfix ubuntu-14.04