disk

check status

$ lsblk
$ ncdu
$ pvs
$ lvs
$ vgs
$ pvscan
$ lvscan
$ pvdisplay
$ vgdisplay
$ lvdisplay
$ fdisk -l
$ sfdisk -l -uM
$ lshw -class disk
$ hwinfo --block --short
$ cat /proc/partitions
$ sudo blkid

mount

mount ios

$ [[ -z $(findmnt /mnt/tmp) ]] || umount -f /mnt/tmp
$ mkdir /mnt/tmp
$ mount -t iso9660 -o loop /vol/builds/os/linux/RHEL-6.6-20140926.0-Server-x86_64-dvd1.iso  /mnt/tmp/

# or: https://www.commandlinefu.com/commands/view/152/mount-a-.iso-file-in-unixlinux
$ mount /path/to/file.iso /mnt/tmp -o loop

create cd/dvd iso

$ readom dev=/dev/scd0 f=/path/to/image.iso

# https://www.commandlinefu.com/commands/view/12852/create-a-cddvd-iso-image-from-disk.
$ dd bs=1M if=/dev/scd0 of=./filename.iso OR readom -v dev='D:' f='./filename.iso' speed=2 retries=8

# https://www.commandlinefu.com/commands/view/12726/create-a-cddvd-iso-image-from-disk.
$ cat /dev/cdrom > ~/img.iso

# https://www.commandlinefu.com/commands/view/8564/create-a-cddvd-iso-image-from-disk.
$ cp /dev/cdrom file.iso

# or
$ mkisofs -o /tmp/cd.iso /tmp/directory/

copy iso to local
```
$ dd if=/dev/cdrom of=whatever.iso
```
rip cd/dvd to iso
```
$ dd if=/dev/cdrom of=~/cdrom_image.iso
```

mount smb

[!NOTE] references:
Mounting a Samba share
如何在 macOS 中停用 SMB 1 或 NetBIOS
Performance issues with SMB 2 and 3 connections
Linux系统运维: Samba 应用
How can I mount an SMB share from the command line?
How to escape password for smb mount
URL Encoded Characters

macos

[!NOTE|label:references:]

Secure way to mount a password protected cifs share in mac

$ sudo security add-internet-password -a "username_here" -D "Network Password" -r "smb " -l "cifs_share" -s "myserver.com" -p "cifs_share" -w "password_here"  -T "/System/Library/CoreServices/NetAuthAgent.app/Contents/MacOS/NetAuthAgent"
$ sudo security add-internet-password -a "username_here" -D "Network Password" -r "afp " -l "cifs_share" -s "myserver.com" -p "cifs_share" -w "password_here"  -T "/System/Library/CoreServices/NetAuthAgent.app/Contents/MacOS/NetAuthAgent"

~/Library/Preferences/nsmb.conf

$ cat ~/Library/Preferences/nsmb.conf
[myserver.com]
username=username_here
password=password_here

via GUI :
- Go -> Connect toServer -> smb://<domain.com>/secured
  samba

via cmd

mount

$ mkdir -p /Volumes/mount
$ sudo mkdir -p $(whoami):staff /Volumes/mount

# mount
$ mount -t smbfs //user1:<password>@<domain.com>/share /Volumes/mount
$ mount -t smbfs -o -d=755,-f=755 //<domain.com>/<path> /Volumes/mount
# or
$ mount -o nodev,nosuid -t smbfs //user:${PASSWORD}@<domain.com>/share /Volumes/mount

# mount_smbfs
$ mount_smbfs //user1@<domain.com>/share /Volumes/mount
Password for <domain.com>: <password>

# umount
$ umount /Volumes/mount
# force umount
$ diskutil unmountDisk force "${mount_point}"

open

$ open "smb://user1:<password>@<domain.com>/path"

osascript

$ /usr/bin/osascript -e "try" -e "mount volume \"smb://guest@${host}\"" -e "end try"

# or with function
function mymount {
    osascript <<EOF
mount volume "smb://user@fqdn1/volume1"
mount volume "smb://user@fqdn2/volume2"
EOF
}

check

$ mount
...
//user1@<domain.com>/secured on /Volumes/mount (smbfs, nodev, nosuid, mounted by user1)

# get hostname
#                        handle for both mount format:  //marslo@domain.com/share
#                                                       //domain.com/share
#                                                                   v
#                                                       +----------------------+
$ mount -t nfs,cifs,smbfs | awk '{print $1}' | sed -rn 's:^//([^@/]*@)?([^/]+).*:\2:p'
domain.com
domain.com
$ mount -t nfs,cifs,smbfs | awk '{print $1}' | sed -rn 's:^//([^@/]*@)?([^/]+).*:\2:p' | paste -sd'|'

linux

$ smbclient --user=user1 -L //<domain.com>

# or
$ smbclient //<domain.com>/secured -U user1

mount cifs

[!NOTE|label:references:]
How do I pass credential file to mount.cifs?
mount.cifs(8) - Linux man page
How do I use a credential file for CIFS in /etc/fstab?
Safer alternative to using .smbcredentials
CIFS vs SAMBA, What are the differences
How do you provide domain credentials to ansible's mount module?
How to access mounted network drive on Windows Linux Subsystem?

environment setup

# centos
$ yum install cifs-utils

# ubuntu
$ sudo apt-get install cifs-utils

create credential file

$ echo "username=user1" > ~/.cifscredentials
$ echo "password=password1" >> ~/.cifscredentials
$ chmod 600 ~/.cifscredentials

mount

$ [[ -d /mnt/mynfs ]] || mkdir -p /mnt/mynfs
$ sudo mount -t cifs //domain.com/path/to/target /mnt/mynfs -o credentials=~/.cifscredentials

NFS share info

$ rpcinfo domain.com | egrep "service|nfs"
1:   program version netid     address             service    owner
8:    100003    3    udp       domain.com.8.1      nfs
9:    100003    3    tcp       domain.com.8.1      nfs

mount nfs

references
Network File System (NFS)
How To Set Up an NFS Mount on Ubuntu 20.04
sample:
nfs server: domain.com
sub-folder: /path/to/target
mount to local: /mnt/mynfs

$ sudo mkdir -p /mnt/mynfs
$ sudo mount -t nfs domain.com:/path/to/target /mnt/mynfs [-vvv]

# or force using nfsversion 4
$ sudo mount -t nfs -o nfsvers=4 domain.com:/path/to/target /mnt/mynfs [-vvv]

# or with permission (rw) and version 3
$ sudo mount -o rw,vers=3 -t nfs domain.com:/path/to/target /mnt/mynfs -vvv

test if sub-folder exists in remote nfs server

$ showmount -e domain.com | grep '/path/to/target'

environment setup

# centos
$ yum install nfs-utils nfs-utils-lib
$ yum install portmap (not required with NFSv4)
# ubuntu
$ sudo apt-get install nfs-common

# for nfs4
$ sudo apt-get install nfs-utils nfs-utils-lib

check mount

$ cat /etc/mtab | grep /folder_name
/dev/sdb1 /folder_name ext4 rw,seclabel,relatime,stripe=64 0 0

Check if folder is a mounted remote filesystem

$ df -P -T /folder_name
Filesystem     Type 1024-blocks     Used  Available Capacity Mounted on
/dev/sdb1      ext4  744******* 658***** 699*******       1% /folder_name

df

$ df /local_storage
Filesystem      1K-blocks     Used  Available Use% Mounted on
/dev/sdb1      744******* 658***** 699*******   1% /folder_name

/etc/fstab

[!NOTE|label:references:]
iMarslo : character#column

$ cat /etc/fstab
$ sed 's/#.*//' /etc/fstab | column --table --table-columns SOURCE,TARGET,TYPE,OPTIONS,PASS,FREQ --table-right PASS,FREQ

findmnt

$ findmnt --fstab /local_storage
TARGET         SOURCE    FSTYPE OPTIONS
/local_storage /dev/sdb1 ext4   defaults

check nfs mount points

$ df -h -F nfs [ | column -t ]
$ mount | column -t | grep -E 'type.*nfs
$ findmnt /mnt/mynfs

check mount version

nfsstat -c will show you the NFS version actually being used
nfsstat -m will show statistics on mounted NFS filesystems
grep nfs /proc/mounts equals nfsstat -m

local

$ rpcinfo -p localhost
  program vers proto   port  service
   100000    4   tcp    111  portmapper
   100000    3   tcp    111  portmapper
   100000    2   tcp    111  portmapper
   100000    4   udp    111  portmapper
   100000    3   udp    111  portmapper
   100000    2   udp    111  portmapper
   100024    1   udp  38978  status
   100024    1   tcp  36415  status
   100021    1   udp  51669  nlockmgr
   100021    3   udp  51669  nlockmgr
   100021    4   udp  51669  nlockmgr
   100021    1   tcp  42699  nlockmgr
   100021    3   tcp  42699  nlockmgr
   100021    4   tcp  42699  nlockmgr

remote

$ rpcinfo domain.com | egrep "service|nfs"
   program version netid     address             service    owner
    100003    3    udp       domain.com.8.1      nfs
    100003    3    tcp       domain.com.8.1      nfs

setup nfs mount by default server boot

$ sudo bash -c "cat > /etc/fstab" << EOF
domain.com:/path/to/target    /mnt/mynfs nfs defaults 0 0
EOF

# i.e.:
$ cat /etc/fstab | grep -v '^#' | column -t
/dev/mapper/cl-root                             /               xfs   defaults                    0  0
UUID=18c35fe1-36ad-4d7e-aeb6-88bdb6b145af       /boot           ext4  defaults                    1  2
UUID=6C3A-C81A                                  /boot/efi       vfat  umask=0077,shortname=winnt  0  2
/dev/mapper/cl-home                             /home           xfs   defaults                    0  0
/dev/mapper/cl-swap                             swap            swap  defaults                    0  0
domain.com:/path/to/target                      /path/to/mount  nfs   defaults                    0  0

related configure

/etc/fstab
/etc/nsswitch.conf
/etc/nfsmount.conf
/etc/nfs.conf
/proc/mounts

mount temporary ram

$ mount -t tmpfs tmpfs /mnt -o size=1024m

remount

$ sudo mount -oremount,rw /

# or
$ sudo mount -oremount,ro /

remount nfs

$ NFSPATH=/mountpoint TIMEOUT=5; perl -e "alarm $TIMEOUT; exec @ARGV" "test -d $NFSPATH" || (umount -fl $NFSPATH; mount $NFSPATH)

# remount if 5 secs no response
$ NFSPATH=/mountpoint TIMEOUT=5;
$ perl -e "alarm $TIMEOUT;
$ exec @ARGV" "test -d $NFSPATH" || (umount -fl $NFSPATH; mount $NFSPATH) # TIMEOUT=5 SCRIPT_NAME=$(basename $0) for i in $@; do echo "Checking $i..." if ! perl -e "alarm $TIMEOUT; exec @ARGV" "test -d $i" > /dev/null 2>&1; then echo "$SCRIPT_NAME: $i is failing with retcode $?."1>&2 echo "$SCRIPT_NAME: Submmiting umount -fl $i" 1>&2 umount -fl $i; echo "$SCRIPT_NAME: Submmiting mount $i" 1>&2 mount $i; fi done

disconnect the mount

$ sudo umount /mnt/mynfs

device is busy

[!NOTE|label:references:]
umount: device is busy. Why?

# check who is occupy the device
$ fuser -vm /path/to/mount
$ sudo fuser -vm /jenkins
                     USER        PID ACCESS COMMAND
/path/to/mount:      root     kernel mount /path/to/mount
                     devops    1369210 ..c.. bash
                     marslo    1377303 ..c.. bash

# or
$ lsof +f -- /path/to/mount
# or interactively kill only processes with files open for writing
$ sudo fuser -vmMkiv /path/to/mount
# or force kill directly without asking
$ sudo fuser -vmMk /path/to/mount

# logout
$ sudo pkill -KILL -u marslo
$ sudo pkill -KILL -u devops

# umount again
$ sudo umount -f /path/to/mount

LVM

[!NOTE|label:reference:]
CONFIGURING AND MANAGING LOGICAL VOLUMES
CHAPTER 5. MODIFYING THE SIZE OF A LOGICAL VOLUME
LVM HOWTO
磁盘与分区: LVM
* Logical Volume Manager Administration
* LVM in Linux — Create and Extend a Logical Volume

COMMAND

NAME

vg

Volume Group

pv

Physical Volume

lv

Logical Volume

check current status

lvm

$ sudo vgs
  VG       #PV #LV #SN Attr   VSize    VFree
  vgubuntu   1   2   0 wz--n- <931.01g    0

$ sudo lvs
  LV     VG       Attr          LSize    Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  root   vgubuntu -wi-ao----    <929.10g
  swap_1 vgubuntu -wi-ao----    1.91g

$ sudo pvs
  PV             VG       Fmt  Attr PSize    PFree
  /dev/nvme0n1p2 vgubuntu lvm2 a--  <931.01g      0
  /dev/sda3               lvm2 ---    <1.82t  <1.82t

disk status

$ sudo lsblk
NAME                MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
sda                   8:0    0   1.8T  0 disk
├─sda1                8:1    0   600M  0 part
├─sda2                8:2    0     1G  0 part /media/devops/99dad889-9bcc-4edb-baa9-3433c2502f18
└─sda3                8:3    0   1.8T  0 part
sdb                   8:16   1     0B  0 disk
sr0                  11:0    1  1024M  0 rom
nvme1n1             259:0    0 931.5G  0 disk
├─nvme1n1p1         259:2    0   512M  0 part
└─nvme1n1p2         259:3    0   931G  0 part /media/devops/f99da1e7-9555-4cdc-9781-6dbc9e6153ca
nvme0n1             259:1    0 931.5G  0 disk
├─nvme0n1p1         259:4    0   512M  0 part /boot/efi
└─nvme0n1p2         259:5    0   931G  0 part
  ├─vgubuntu-root   253:0    0 929.1G  0 lvm  /var/snap/firefox/common/host-hunspell
  │                                           /
  └─vgubuntu-swap_1 253:1    0   1.9G  0 lvm  [SWAP]

add new pv ( Physical Volume )

$ sudo pvcreate /dev/nvme1n1p2
  Can't open /dev/nvme1n1p2 exclusively.  Mounted filesystem?
  Can't open /dev/nvme1n1p2 exclusively.  Mounted filesystem?

$ sudo mount | grep f99da1e7-9555-4cdc-9781-6dbc9e6153ca
/dev/nvme1n1p2 on /media/devops/f99da1e7-9555-4cdc-9781-6dbc9e6153ca type ext4 (rw,nosuid,nodev,relatime,errors=remount-ro,uhelper=udisks2)
$ sudo umount /dev/nvme1n1p2
$ sudo mount | grep f99da1e7-9555-4cdc-9781-6dbc9e6153ca

$ sudo lsblk /dev/nvme1n1
NAME                MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
nvme1n1             259:0    0 931.5G  0 disk
├─nvme1n1p1         259:2    0   512M  0 part
└─nvme1n1p2         259:3    0   931G  0 part

$ sudo pvcreate /dev/nvme1n1p2
WARNING: ext4 signature detected on /dev/nvme1n1p2 at offset 1080. Wipe it? [y/n]: y
  Wiping ext4 signature on /dev/nvme1n1p2.
  Physical volume "/dev/nvme1n1p2" successfully created.

$ sudo pvs
  PV             VG       Fmt  Attr PSize    PFree
  /dev/nvme0n1p2 vgubuntu lvm2 a--  <931.01g      0
  /dev/nvme1n1p2          lvm2 ---   931.01g 931.01g
  /dev/sda3               lvm2 ---    <1.82t  <1.82t

moving home with lvm

[!NOTE|label:references]
Moving /home with LVM

extend lv

# check status
$ sudo pvs
   PV         VG        Fmt  Attr PSize    PFree
    /dev/vda3  ubuntu-vg lvm2 a--   <38.00g     0
    /dev/vdb1  ubuntu-vg lvm2 a--  <275.00g     0
$ sudo vgs
    VG        #PV #LV #SN Attr   VSize    VFree
    ubuntu-vg   2   2   0 wz--n- <313.00g     0
$ sudo lvs
   LV             VG        Attr       LSize    Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
    ubuntu-lv      ubuntu-vg -wi-ao---- <100.00g
    ubuntu-lv-home ubuntu-vg -wi-ao----  100.00g
    ubuntu-lv-var  ubuntu-vg -wi-ao----  100.00g
$ sudo dmidecode -t1
$ sudo blkid
$ lsblk

# enable qemu-guest-agent
$ sudo apt-get install qemu-guest-agent
$ sudo systemctl restart qemu-guest-agent.service
$ sudo systemctl enable qemu-guest-agent.service
$ sudo systemctl status qemu-guest-agent.service

# create pv
$ sudo pvcreate /dev/temp

# extend vg
$ sudo vgextend ubuntu-vg /dev/temp

# extend lv
$ sudo lvextend -L +100G /dev/ubuntu-vg/ubuntu-lv-home
$ sudo resize2fs /dev/ubuntu-vg/ubuntu-lv-home

remove LVM

[!TIP]
remove order:
lv
pv
vg
15.2.2. Removing an LVM2 Logical Volume for Swap
5.3.10. Removing Volume Groups
Linux Quick Tip: How to Delete or Remove LVM volumes
Removing an existing LVM volume

$ sudo lvremove /dev/cl/home
# for swap
$ sudo swapoff -v /dev/cl/swap
$ sudo lvremove /dev/cl/swap
# and remove swap from `/etc/fstab`
$ sudo awk '!/\/dev\/cl\/swap/' /etc/fstab

$ sudo pvremove <pv-name>
$ sudo vgremove <vg-name>

example

extends the logical volume /dev/myvg/homevol to 12 gigabytes

$ sudo lvextend -L12G /dev/myvg/homevol
lvextend -- extending logical volume "/dev/myvg/homevol" to 12 GB
lvextend -- doing automatic backup of volume group "myvg"
lvextend -- logical volume "/dev/myvg/homevol" successfully extended

adds another gigabyte to the logical volume /dev/myvg/homevol

$ sudo lvextend -L+1G /dev/myvg/homevol
lvextend -- extending logical volume "/dev/myvg/homevol" to 13 GB
lvextend -- doing automatic backup of volume group "myvg"
lvextend -- logical volume "/dev/myvg/homevol" successfully extended

others

NFS

references:
* NFS

squid

references:
* squid

performance

check NFS performance

references:
Using nfsstat and nfsiostat to troubleshoot NFS performance issues on Linux
NFS poor write performance
Analyzing Linux NFS server performance

nfsstat
nfsiostat
collectl
- collectl -sjmf -oT
- collectl -sn --verbose -oT
- collectl -sJ -oTm
tshark -R nfs -i eth0
nfswatch
netstat -plaute | grep nfs
watch -d "netstat -plaute | grep nfs | sort -k 4,5"
iostat -mx <delay in sec.> <devices>
sudo fio --randrepeat=1 --ioengine=libaio --direct=0 --gtod_reduce=1 --name=test1 --filename=/media/ramdisk/test --bs=4k --iodepth=64 --size=4G --readwrite=randrw --rwmixread=75
time dd if=/dev/zero of=/mnt/nfs/testfile bs=16k count=128k
iozone -aRcU /mnt/nfs/ -f /mnt/nfs/testfile > logfile

`iostat`

[!TIP|label:references:]
show vmstat with timestamp
$ iostat <--params> | awk '{now=strftime("%Y-%m-%d %T "); print now $0}'

$ iostat -x -d 1
Linux 3.10.0-957.27.2.el7.x86_64 (dc5-ssdfwtst3)  01/15/2021  _x86_64_  (4 CPU)

Device:         rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s avgrq-sz avgqu-sz   await r_await w_await  svctm  %util
sda               0.00     0.09    0.07   13.91     6.83    81.26    12.61     0.01    0.93   11.40    0.88   0.38   0.53
dm-0              0.00     0.00    0.07   14.00     6.83    81.26    12.53     0.01    0.95   11.60    0.90   0.38   0.53
dm-1              0.00     0.00    0.00    0.00     0.00     0.00    52.91     0.00    0.64    0.64    0.00   0.48   0.00

`sar`

$ sar -bdp 1
Linux 3.10.0-957.27.2.el7.x86_64 (dc5-ssdfwtst3)  01/15/2021  _x86_64_  (4 CPU)

05:44:20 AM       tps      rtps      wtps   bread/s   bwrtn/s
05:44:21 AM    863.00    863.00      0.00  47048.00      0.00

05:44:20 AM       DEV       tps  rd_sec/s  wr_sec/s  avgrq-sz  avgqu-sz     await     svctm     %util
05:44:21 AM       sda    863.00  47048.00      0.00     54.52      2.86      3.33      0.16     14.20
05:44:21 AM centos-root    863.00  47048.00      0.00     54.52      2.88      3.33      0.16     14.20
05:44:21 AM centos-swap      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00

hdparm

[!NOTE] hdparm - get/set SATA/IDE device parameters
references:
Linux and Unix Test Disk I/O Performance With dd Command
hdparm Command Examples in Linux
hdparm command in Linux with Examples

$ sudo hdparm -Tt /dev/sda3
/dev/sda3:
 Timing cached reads:   15900 MB in  1.99 seconds = 7978.64 MB/sec
 Timing buffered disk reads: 1796 MB in  3.00 seconds = 598.17 MB/sec

$ sudo hdparm -Tt /dev/sda3
/dev/sda3:
 Timing cached reads:   18924 MB in  1.98 seconds = 9539.84 MB/sec
 Timing buffered disk reads: 102 MB in 12.88 seconds =   7.92 MB/sec

dd

[!NOTE|label:references:]
Linux and Unix Test Disk I/O Performance With dd Command
network speed without wasting disk

$ flush
$ echo 3 | sudo tee /proc/sys/vm/drop_caches
$ time dd if=/path/to/bigfile of=/dev/null bs=8k

write speed

$ dd if=/dev/zero of=/tmp/test1.img bs=1G count=1 oflag=dsync

# for NFS ( 2Gb )
$ time dd if=/dev/zero of=/mnt/nfs/testfile bs=16k count=128k

read spead

# for NFS ( 2Gb )
$ time dd if=/mnt/nfs/testfile of=/dev/null bs=16k

server latency time

$ dd if=/dev/zero of=/tmp/test2.img bs=512 count=1000 oflag=dsync

samba

[!NOTE] references:
Instructions for setting up a secure Samba share on CentOS 8 Linux
How to Install and Configure Samba on CentOS 8

setup

# install
$ sudo dnf install samba samba-common samba-client
$ sudo mv /etc/samba/smb.conf /etc/samba/smb.con.bak

# setup user
$ sudo groupadd secure_group
$ sudo useradd -g secure_group user1
$ sudo useradd -g secure_group user2

# create folder
$ sudo mkdir -p /srv/samba/shared
$ sudo mkdir -p /srv/samba/secure_shared

$ sudo smbpasswd -a user1
  password_1
$ sudo smbpasswd -a user2
  password_2

configure

$ cat /etc/samba/smb.conf
[global]
workgroup = WORKGROUP
server string = Samba Server %v
netbios name = centos-8
security = user
map to guest = bad user
dns proxy = no
ntlm auth = yes              // for windows

for anonymous

$ sudo chmod -R 0755 /srv/samba/shared
$ sudo chown -R nobody:nobody /srv/samba/shared
$ sudo chcon -t samba_share_t /srv/samba/shared
# or
$ sudo chcon -R system_u:object_r:samba_share_t:s0 /srv/samba/shared

$ cat /etc/samba/smb.conf
[anonymous]
path = /srv/samba/shared
browsable =yes
writable = yes
guest ok = yes
read only = no
force user = nobody

$ testparm

for secured

$ sudo chmod -R 0770 /srv/samba/secure_shared
$ sudo chcon -t samba_share -p /srv/samba/secure_shared
$ sudo chown -R root:secure_group /srv/samba/secure_shared

$ cat /etc/samba/smb.conf
[secured]
path = /srv/samba/secure_shared
valid users = @secure_group
guest ok = no
writable = yes
browsable = yes

# verify the configuration is sound
$ testparm

firewall is necessary

# centos
$ sudo firewall-cmd --add-service=samba --zone=public --permanent
$ sudo firewall-cmd --reload

# ubuntu: https://help.ubuntu.com/lts/serverguide/firewall.html
$ sudo ufw app list
$ sudo ufw allow Samba
$ sudo ufw allow from 192.168.0.0/24 to any app Samba
$ sudo ufw app info Samba

enable services

# enable service
$ sudo systemctl start smb
$ sudo systemctl enable smb
$ sudo systemctl status smb
$ sudo systemctl start nmb
$ sudo systemctl enable nmb
$ sudo systemctl status nmb

config
[!TIP] FILES :
- /etc/nsmb.conf
  The global configuration file.
- ~/Library/Preferences/nsmb.conf
  The user's configuration file, conflicts will be overwritten by the global file.
```
$ cat /etc/nsmb.conf
[default]
signing_required=no
file_ids_off=yes
```

smbclient

$ smbclient -L //domain.com -U marslo -W domain.com
Password for [DOMAIN.COM\marslo]:

  Sharename       Type      Comment
  ---------       ----      -------
  ADMIN$          Disk      Remote Admin
  C$              Disk      Default share
  data            Disk
  IPC$            IPC       Remote IPC
  NETLOGON        Disk      Logon server share
  SYSVOL          Disk      Logon server share
SMB1 disabled -- no workgroup available

if no permission

$ smbclient -L //domain.com -U account -W domain.com
Password for [DOMAIN.COM\account]:
session setup failed: NT_STATUS_LOGON_FAILURE

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Last updated 4 months ago

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