구차니의 잡동사니 모음

$ tar -cvfS test_spar.tar 123123.qcow2

$ tar -S -cvf test_spar.tar 123123.qcow2 

$ ll

-rw-------. 1 root root   9665380352 Aug  8  2018 123123.qcow2

-rw-r--r--. 1 root root      1484800 Feb 14 18:10 test_spar.tar

-rw-r--r--. 1 root root   9665382400 Feb 14 18:09 test.tar

 To have tar attempt to recognize the holes in a file, use `--sparse' (`-S'). 

Advantages

The advantage of sparse files is that storage is only allocated when actually needed: disk space is saved, and large files can be created even if there is insufficient free space on the file system.

Disadvantages

Disadvantages are that sparse files may become fragmented; file system free space reports may be misleading; filling up file systems containing sparse files can have unexpected effects; and copying a sparse file with a program that does not explicitly support them may copy the entire, uncompressed size of the file, including the sparse, mostly zero sections which are not on disk -- losing the benefits of the sparse property in the file. 

ls -s tells you the allocated size of the file, always a multiple of the allocation unit. ls -l tells the actual size. An easy way to test: 

$ man ls

       --block-size=SIZE

              scale sizes by SIZE before printing them; e.g., '--block-size=M'

              prints sizes in units of 1,048,576 bytes; see SIZE format below 

2. Update the firmware from FTP or HTTP source

FTP address: ftp.dell.com 
Catalog location: catalog 
Catalog File Name: catalog.xml.gz

It is also possible to use the HTTP method if the FTP method is not responding properly.

HTTP address is : downloads.dell.com 

#################################################

  OpenManage || iDRAC Service Module

#################################################

    Available feature options:

   [x] 1. Watchdog Instrumentation Service

   [x] 2. LifeCycle Log Information

   [x] 3. Operating System Information

   [ ] 4. iDRAC access via Host OS

           [ ] a. Access via GUI, WS-man, Redfish, Remote Racadm

           [ ] b. In-band SNMP Traps

           [ ] c. Access via SNMP Get

       5. iDRAC Hard Reset

       6. Support Assist

       7. Full Power Cycle

   [ ] 8. All Features

  Enter the number to select/deselect a feature from the above list.

                ( multiple feature selection should be comma separated)

                ( to select sub-features, please use 4.a,4.b, etc.)

  Enter q to quit.

  Enter :

#################################################

  OpenManage || iDRAC Service Module

#################################################

    Available feature options:

   [x] 1. Watchdog Instrumentation Service

   [x] 2. LifeCycle Log Information

   [x] 3. Operating System Information

   [x] 4. iDRAC access via Host OS

           [x] a. Access via GUI, WS-man, Redfish, Remote Racadm

           [x] b. In-band SNMP Traps

           [x] c. Access via SNMP Get

       5. iDRAC Hard Reset

       6. Support Assist

       7. Full Power Cycle

   [x] 8. All Features

  Enter the number to select/deselect a feature

        ( multiple feature selection should be comma separated)

                ( to select sub-features, please use 4.a,4.b, etc.)

  Enter i to install the selected features.

  Enter q to quit.

  Enter : 

  Enter : i

경고: /root/downlaod/RHEL7/x86_64/dcism-3.2.0-1234.el7.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID 34d8786f: NOKEY

준비 중...                         ################################# [100%]

Updating / installing...

   1:dcism-3.2.0-1234.el7             ################################# [100%]

Enter a valid port number for iDRAC access via Host OS or Enter to take default port number: 

Enter a valid port number for iDRAC access via Host OS or Enter to take default port number:

Do you want the services started?

   Press ('y' for yes | 'Enter' to exit): y

  Checking for iSM communication with iDRAC...

    Waiting...                  ######################### 

# setsebool samba_export_all_rw 1 

[root@localhost ~]# getsebool -a | grep samba

samba_create_home_dirs --> off

samba_domain_controller --> off

samba_enable_home_dirs --> off

samba_export_all_ro --> off

samba_export_all_rw --> off

samba_load_libgfapi --> off

samba_portmapper --> off

samba_run_unconfined --> off

samba_share_fusefs --> off

samba_share_nfs --> off

sanlock_use_samba --> off

tmpreaper_use_samba --> off

use_samba_home_dirs --> off

virt_use_samba --> off

[root@localhost ~]# getsebool -a | grep smb

smbd_anon_write --> off

[root@localhost ~]# getsebool -a | grep nmb

[root@localhost ~]# 

If you want to allow samba to share any file/directory read/write, you must turn on the samba_export_all_rw boolean.

setsebool -P samba_export_all_rw 1