How to delete old Time Machine backup with tmutil command.

Objective:

just my memorandum :)

System:

My Time Machine:

Ubuntu 14.04 trusty
- netatalk 2.2.2
netatalk configuration

# cat /etc/netatalk/AppleVolumes.default | grep "TimeMachine-for-mba1"
/mnt/export/TimeMachine4  "TimeMachine-for-mba1"      options:usedots,upriv,tm ea:ad allow:hirofumi volsizelimit:250000

Client:

Mac OS X 10.11.3 (El Capitan)

# tmutil destinationinfo
====================================================
Name          : TimeMachine-for-mba1
Kind          : Network
URL           : afp://hirofumi@fs1._afpovertcp._tcp.local./TimeMachine-for-mba1
Mount Point   : /Volumes/TimeMachine-for-mba1
ID            : 41302FE3-081D-4034-8B81-F7C0FD3A0C3C

list backups:

tmutil listbackups

sample

# tmutil listbackups
/Volumes/Time Machine Backups/Backups.backupdb/Hirofumi’s MacBook Air/2016-03-31-001335
/Volumes/Time Machine Backups/Backups.backupdb/Hirofumi’s MacBook Air/2016-04-01-005550
/Volumes/Time Machine Backups/Backups.backupdb/Hirofumi’s MacBook Air/2016-04-02-003630
(snip)

delete backup(s):

tmutil delete <backup_target>

sample_for_delete_oldest

# tmutil delete "`tmutil listbackups | head -1`"
Deleting: /Volumes/Time Machine Backups/Backups.backupdb/Hirofumi’s MacBook Air/2016-03-31-001335
Deleted (5.3G): /Volumes/Time Machine Backups/Backups.backupdb/Hirofumi’s MacBook Air/2016-03-31-001335
Total deleted: 5.3G

sample_for_delete_old_3

# for ((x=1; x<=3; x++)) ; do tmutil delete "`tmutil listbackups | head -1`" ; done
Deleting: /Volumes/Time Machine Backups/Backups.backupdb/Hirofumi’s MacBook Air/2016-04-01-005550
Deleted (1.9G): /Volumes/Time Machine Backups/Backups.backupdb/Hirofumi’s MacBook Air/2016-04-01-005550
Total deleted: 1.9G
Deleting: /Volumes/Time Machine Backups/Backups.backupdb/Hirofumi’s MacBook Air/2016-04-02-003630
Deleted (2.0G): /Volumes/Time Machine Backups/Backups.backupdb/Hirofumi’s MacBook Air/2016-04-02-003630
Total deleted: 2.0G
Deleting: /Volumes/Time Machine Backups/Backups.backupdb/Hirofumi’s MacBook Air/2016-04-03-010626
Deleted (7.6G): /Volumes/Time Machine Backups/Backups.backupdb/Hirofumi’s MacBook Air/2016-04-03-010626
Total deleted: 7.6G

start backup:

tmutil startbackup

show backup state:

ref. http://apple.stackexchange.com/questions/162464/time-machine-progress-from-the-command-line

tmutil status

sample1

# tmutil status
Backup session status:
{
    BackupPhase = Copying;
    ClientID = "com.apple.backupd";
    DateOfStateChange = "2016-04-11 12:07:18 +0000";
    DestinationID = "41302FE3-081D-4034-8B81-F7C0FD3A0C3C";
    DestinationMountPoint = "/Volumes/Time Machine Backups";
    Percent = "0.04944647446240578";
    Progress =     {
        TimeRemaining = 3823;
        "_raw_totalBytes" = 4347141887;
        bytes = 238834267;
        files = 9550;
        totalBytes = 4781856075;
        totalFiles = 9550;
    };
    Running = 1;
    Stopping = 0;
    "_raw_Percent" = "0.05494052718045087";
}

sample2

# tmutil status | awk '/_raw_Percent/ {print $3}' | grep -o '[0-9].[0-9]\+' | awk '{print $1*100,"% backed up"}'
17.8677 % backed up