<\/span>command:<\/span><\/p>\n# lsblk<\/strong><\/span><\/pre>\nThe partition corresponding to rescue mode will be the one mounted in the \/ directory, which is actually the system root. In contrast, the partition of your VPS<\/span> will probably be placed in the directory associated with \/mnt, or not mounted at <\/span>all.<\/span><\/p>\nNAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT\nsda 254:0 0<\/span> 10G 0<\/span> disk\n\u2514\u2500sda1 254:1 0<\/span> 10G 0<\/span> part \/\nsdb 254:16 0<\/span> 25G 0<\/span> disk\n\u2514\u2500sdb1 254:17 0<\/span> 25G 0<\/span> part \/mnt\/sdb1<\/strong><\/span><\/pre>\nTo unmount your partition, use the following <\/span>command:<\/span><\/p>\n# umount \/dev\/sdb1<\/strong><\/span><\/pre>\nCheck the filesystem<\/span><\/h4>\nAfter unmounting the partition, you should check the filesystem filesystem check<\/strong> to see if there are errors in the partition. The command is as <\/span>follows:<\/span><\/p>\n# e2fsck -yf \/dev\/sdb1\n\ne2fsck 1.42.9 (<\/span>4-Feb-2014)<\/span>\nPass 1: Checking inodes, blocks, and sizes\nPass 2: Checking directory structure\nPass 3: Checking directory connectivity\nPass 4: Checking reference counts\nPass 5: Checking group summary information\n\/dev\/sdb1: 37870\/1310720 files (<\/span>0.2% non-contiguous)<\/span>, 313949\/5242462 blocks<\/strong><\/span><\/pre>\nIf you receive a bad magic number in superblock error, do not proceed. A procedure to fix this issue is given at the end of this guide.<\/strong><\/span><\/pre>\nLaunch the fdisk <\/span>application<\/span><\/h4>\nIf the filesystem check is completed successfully, launch the fdisk<\/strong> application. In the settings, you need to enter the name of the disk and not the name of the partition. For instance, if your partition is sdb1<\/strong> instead of vdb1<\/strong>, the disk name will be <\/span>\/dev\/sdb<\/strong><\/em>.<\/span><\/p>\n# fdisk -u \/dev\/sdb<\/strong><\/span><\/pre>\nThis application has several sub-commands, which you can view with the command m.<\/strong><\/span><\/pre>\nDelete the old <\/span>partition<\/span><\/h4>\nBefore deleting the old partition, it is recommended that you write down the number corresponding to the first sector of the partition. You can find this information through the command p<\/strong>. The information is listed under the Start<\/strong> field. Save this data for <\/span>later.<\/span><\/p>\nCommand (<\/span>m for<\/span> help<\/span>)<\/span>: p\n\nDisk \/dev\/sdb: 21.5 GB, 21474836480<\/span> bytes\n54<\/span> heads, 49<\/span> sectors\/track, 15851<\/span> cylinders, total 41943040<\/span> sectors\nUnits<\/span> =<\/span> sectors of 1<\/span> * 512<\/span> =<\/span> 512<\/span> bytes\nSector size (<\/span>logical\/physical)<\/span>: 512<\/span> bytes \/ 512<\/span> bytes\nI\/O size (<\/span>minimum\/optimal)<\/span>: 512<\/span> bytes \/ 512<\/span> bytes\nDisk identifier: 0x000132ff\n\nDevice Boot Start End Blocks Id System\n\/dev\/sdb1 * *2048* 41941745<\/span> 20969849<\/span> 83<\/span> Linux<\/strong><\/span><\/pre>\nIf you haven\u2019t backed up your data, this is the point of no return.<\/strong><\/span><\/pre>\nThen delete the partition with the command d<\/strong>.<\/span><\/p>\nCommand (<\/span>m for<\/span> help<\/span>)<\/span>: d\nSelected partition 1<\/strong><\/span><\/pre>\nThe single partition will automatically be <\/span>deleted.<\/span><\/p>\nCreate a new <\/span>partition<\/span><\/h4>\nYou now need to create a new partition with the command n<\/strong>. It is recommended that you use the default <\/span>values.<\/span><\/p>\nCommand (<\/span>m for<\/span> help<\/span>)<\/span>: n\nPartition type:\np primary (<\/span>0<\/span> primary, 0<\/span> extended, 4<\/span> free)<\/span>\ne extended\nSelect (<\/span>default p)<\/span>: p\nPartition number (<\/span>1-4, default 1)<\/span>: 1\nFirst sector (<\/span>2048-41943039, default 2048)<\/span>: 2048\nLast sector, +sectors or +size{<\/span>K,M,G}<\/span> (<\/span>2048-41943039, default 41943039)<\/span>: 41943039.<\/strong><\/span><\/pre>\nOn the First sector<\/strong> line, check that the default value is the same as the one you have previously written down. If it is different, use the value you have written <\/span>down.<\/span><\/p>\nMaking the partition <\/span>bootable<\/span><\/h4>\nYou now need to ensure that the partition is bootable. You can do this using the command a<\/strong>.<\/span><\/p>\nCommand (<\/span>m for<\/span> help<\/span>)<\/span>: a\n\nPartition number (<\/span>1-4)<\/span>: 1<\/strong><\/span><\/pre>\nSave your changes and exit the application with the command w<\/strong>:<\/span><\/p>\nCommand (<\/span>m for<\/span> help<\/span>)<\/span>: w\n\nThe partition table has been altered!\n\nCalling ioctl()<\/span> to re-read partition table.\nSyncing disks.<\/strong><\/span><\/pre>\nExtending the filesystem on the <\/span>partition<\/span><\/h4>\nThe partition has been extended, but the filesystem still occupies the same space as before. To extend it, simply enter the following <\/span>command:<\/span><\/p>\n# resize2fs \/dev\/sdb1\n\nresize2fs 1.42.9 (<\/span>4-Feb-2014)<\/span>\nResizing the filesystem on \/dev\/sdb1 to 5242624<\/span> (<\/span>4k)<\/span> blocks.\nThe filesystem on \/dev\/sdb1 is now 5242624<\/span> blocks long.<\/strong><\/span><\/pre>\nCheck the results<\/span><\/h4>\nIn order to check if the extension has been successful, you can mount the newly created partition and verify its <\/span>size.<\/span><\/p>\n# mount \/dev\/sdb1 \/mnt<\/strong><\/span><\/pre>\n# df -h\n\nFilesystem Size Used Avail Use% Mounted on\n\/dev\/sda1 991M 793M 132M 86% \/\nnone 4.0K 0<\/span> 4.0K 0% \/sys\/fs\/cgroup\nudev 1.9G 12K 1.9G 1% \/dev\ntmpfs 386M 360K 386M 1% \/run\nnone 5.0M 0<\/span> 5.0M 0% \/run\/lock\nnone 1.9G 0<\/span> 1.9G 0% \/run\/shm\nnone 100M 0<\/span> 100M 0% \/run\/user\n\/dev\/sdb1 50G 842M 48G 2% \/mnt<\/strong><\/span><\/pre>\nYou will find the new partition size listed below the label size<\/strong>.<\/span><\/p>\nHow do I fix a bad magic number in superblock<\/em> <\/span>error?<\/span><\/h4>\nIf the command e2fsck<\/strong> returns the error message bad magic number in superblock<\/strong>, you should check and repair the filesystem by using a backup of the superblock. To see which backups of the superblock are available, enter the following