Salve, per esigenze di università devo installare centos7, ho un vecchio macbook su cui ho già installato Snowleopard, Debian e Ubuntu più la partizione di swap, con rEFIt come boot loader.
Ho cancellato la partizione di Ubuntu, circa 80GB, e volevo installare centos al suo posto ora come posso procedere per installare centos sulla partizione di /dev/sda4?
con anaconda devo andare su >io configurerò le partizioni, e poi?
utilizzando il tool di partizionameno automatico vedo che  credebbe delle partizioni diverse da dev/sda4.

allego per completezza il risultato di fdisk

[liveuser@localhost ~]$ sudo fdisk -l

We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:

    #1) Respect the privacy of others.
    #2) Think before you type.
    #3) With great power comes great responsibility.

WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.

Disk /dev/sda: 500.1 GB, 500107862016 bytes, 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: gpt
Disk identifier: F724B587-310C-42FF-A875-662AAC90BF07


#         Start          End    Size  Type            Name
 1           40       409639    200M  EFI System      EFI System Partition
 2       409640    142987767     68G  Apple HFS/HFS+  MAC4
 3    142989312    781463551  304.5G  Linux filesyste DEBIAN
 5    965056512    976771071    5.6G  Linux swap      swap

Disk /dev/loop0: 0 MB, 20480 bytes, 40 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/loop1: 4 MB, 4534272 bytes, 8856 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/loop2: 1432 MB, 1432489984 bytes, 2797832 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/loop3: 8589 MB, 8589934592 bytes, 16777216 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/loop4: 536 MB, 536870912 bytes, 1048576 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/mapper/live-rw: 8589 MB, 8589934592 bytes, 16777216 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/mapper/live-base: 8589 MB, 8589934592 bytes, 16777216 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/mapper/live-osimg-min: 8589 MB, 8589934592 bytes, 16777216 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