One of the logical volumes on my desktop is running out of space. I want to add 200GB to that volume. Here is one way to achieve this task. First a bit of warning. Don’t, or never, just copy and paste what you see here if you want to apply it to your own system. You may accidentally destroy your precious data. # lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert backup data -wi-ao---- 200.00g scratch data -wi-ao---- 1.00t home system -wi-ao---- 90.00g root system -wi-ao---- 100.00g swap system -wi-ao---- 16.00g tmp system -wi-a----- 4.00g var system -wi-ao---- 20.00g Let’s check the available disk space of volume groups we can use: ...

One of the disks in my FreeBSD server reported an issue: Jul 14 18:00:56 nas kernel: GEOM: da0: the primary GPT table is corrupt or invalid. Jul 14 18:00:56 nas kernel: GEOM: da0: using the secondary instead -- recovery strongly advised. Jul 14 18:00:56 nas kernel: GEOM: diskid/DISK-67304734999999999999: the primary GPT table is corrupt or invalid. Jul 14 18:00:56 nas kernel: GEOM: diskid/DISK-67304734999999999999: using the secondary instead -- recovery strongly advised. To verify it, first I used gdisk command: ...

vdi file is a type of disk image used by VirtualBox. qcow2, on the other hand, is the format of disk image used by KVM. Recently, I want to move some existing virtual machines running on VirtualBox to KVM. To do that I need to convert the disk image from vdi to qcow2. Here’s one way to achieve that: # qemu-img convert -f vdi -O qcow2 disk.vdi disk.qcow2 Ref: How to convert VirtualBox vid to KVM qcow2

I just found out that git is not fully functional on my FreeBSD (11) box. It was installed from port (using portmaster git). I can clone a repo using SSH key, but not with HTTPS. I’m not quite sure if it’s always been this way. Here is how to fix it: Reinstall curl # pkg remove curl # portmaster curl Reinstall git # pkg remove git # portmaster git Why did I install git from port? Well, ‘cuz there is no binary package for FreeBSD 11 arm, which runs on my Raspberry Pi B+.

I have a server running CentOS 6 successfully upgraded to CentOS 7. The only problem I encountered so far is that ‘grep’ doesn’t work. [root@zilla ~]# grep grep: error while loading shared libraries: libpcre.so.0: cannot open shared object file: No such file or directory [root@zilla ~]# ldd /usr/bin/grep linux-vdso.so.1 => (0x00007ffc0b639000) libpcre.so.0 => not found libc.so.6 => /lib64/libc.so.6 (0x00007f6be1c6c000) /lib64/ld-linux-x86-64.so.2 (0x00007f6be2038000) First thing I tried was to reinstall pcre package which provides libpcre.so*. It still didn’t work. Fortunately, someone has posted a solution as the following: ...