Define one node as secondary and discard data on this
drbdadm secondary all drbdadm disconnect all drbdadm -- --discard-my-data connect all
Define anoher node as primary and connect
drbdadm primary all drbdadm disconnect all drbdadm connect all
Tag Archives: unix
Test Jumbo Frames / MTU 9000
Linux:
ping -M do -s 8972 xxx.xxx.xxx.xxx
OSX/BSD:
ping -D -s 8184 xxx.xxx.xxx.xxx
Windows:
ping -f -l 9000 xxx.xxx.xxx.xxx
Example results on Linux
If you’ve forgotten to enable jumbo frames/9k MTU on your client device you’re sending the ping from:
PING xxx.xxx.xxx.xxx (xxx.xxx.xxx.xxx): 8184 data bytes ping: sendto: Message too long
If you have enabled jumbo frames on your client but not the destination (or a switch in between):
PING xxx.xxx.xxx.xxx (xxx.xxx.xxx.xxx): 8184 data bytes Request timeout for icmp_seq 0
If you’ve done everything righ:
PING xxx.xxx.xxx.xxx (xxx.xxx.xxx.xxx): 8184 data bytes 8192 bytes from xxx.xxx.xxx.xxx: icmp_seq=0 ttl=128 time=0.714 ms
bash DNSDIST dashboard
WebDAV with cURL
Assuming the following Data:
- Webdav URL: http://example.com/webdav
- Username: user
- Password: pass
Actions
Reading Files/Folders
curl 'http://example.com/webdav'
Creating new Folder
curl -X MKCOL 'http://example.com/webdav/new_folder'
Uploading File
curl -T '/path/to/local/file.txt' 'http://example.com/webdav/test/new_name.txt'
Renaming File
curl -X MOVE --header 'Destination:http://example.org/webdav/new.txt' 'http://example.com/webdav/old.txt'
Deleting Files/Folders
File:
curl -X DELETE 'http://example.com/webdav/test.txt'
Folder:
curl -X DELETE 'http://example.com/webdav/test'
List Files in a Folder
curl -i -X PROPFIND http://example.com/webdav/ --upload-file - -H "Depth: 1" <<end <?xml version="1.0"?> <a:propfind xmlns:a="DAV:"> <a:prop><a:resourcetype/></a:prop> </a:propfind> end
Mount disk image partition
View partition table of disk.img:
fdisk -lu disk.img
Disk disk.img: 1.3 GiB, 1361051648 bytes, 2658304 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: 0x6f92008e Device Boot Start End Sectors Size Id Type disk.img1 8192 131071 122880 60M c W95 FAT32 (LBA) disk.img2 131072 2658303 2527232 1.2G 83 Linux
Mount partition by using start multiplied by sector size as offset
mount -o loop,offset=$((131072 * 512)) disk.img /mnt