Umount target is busy redhat

Umount target is busy redhat. umount: /common: device is busy. To list all mounted file systems, use the findmnt utility: $ findmnt. com: . sudo mount /dev/sdb2 or /dev/sdb5 it says. The syntax is straightforward: umount [options] <mountpoint|device>. Giving the special device on which the. \n (In some cases useful info about processes that use\n the device is found by lsof(8) or fuser(1))') Oct 16, 2021 · すると target is busy のエラーが返ってきて、アンマウントできなかった。. To unmount a CD that was previously mounted to the /media/cdrom/ directory, type the following at Nov 21, 2023 · This guide offers insights and solutions to tackle this issue, explaining how to identify processes using the mount point and safely unmount filesystems, ensuring smooth system operations without data loss or corruption. Apr 26, 2018 · 리눅스 언마운트 (umount) target is busy 발생할 경우. umount /dev/sdd1. However, if this filesystem is in use – say, you have a terminal open that’s accessing Sep 20, 2019 · In our example we will be mounting an ISO image rhel-8. or. デバイスへのプロセスが停止していることを確認出来たら下記コマンドでアンマウントします．. This originally caused the server to not boot. the xfs_repair -L option to destroy the log and attempt a repair. the device is found by lsof(8) or fuser(1)) and if I add the force option -f it gives the same result: [root@cn17663-ens4 mnt]# umount /mnt/lustre -f. 1 GB, 500107862016 bytes. Aug 01 16:55:19 mymachine umount[353194]: (In some cases useful info about processes that use Aug 01 16:55:19 mymachine umount[353194]: the device is found by lsof(8) or fuser(1)) Aug 01 16:55:19 mymachine systemd[1]: vols-data5. If the location bar does not display, press Ctrl + L . In order to unmount the file system, no application or user may use the file system. This has nothing to do with being mounted. Or use fuser, part of the psmisc package. You might have a process cd 'd to there, or reading/writing there. \n (In some cases useful info about processes that use\n the device is found by lsof(8) or fuser(1))') Aug 20, 2018 · With Ubuntu 18. 사용하고 있는 Jul 22, 2010 · 617104 – unable to umount btrfs based filesystems. g. 누군가 마운트된 경로를 사용 중일 때 target is busy라고 나오게 되는데, 해당 프로세스를 강제로 kill한 뒤 언마운트하면 됩니다. 32-504. If you are unable to mount the filesystem, then use. Please be aware that programs may not expect a force or lazy unmounting and Jul 8, 2022 · アンマウント. Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9 Sep 16, 2023 · Gain insights into the “umount target is busy” error, its , and the it has on system operations. ”。. Then you can decide if you want to kill the process to umount the dir. 116) Ask the filesystem to abort pending requests before When you mount a file system using the mount command without all required information, that is without the device name, the target directory, or the file system type, the mount utility reads the content of the /etc/fstab file to check if the given file system is listed there. I have tried to find who is using it, but neither lsof nor There is a way to detach a busy device immediately - even if it is busy and cannot be unmounted forcefully. But take care! mount --make-rslave m. of the filesystem before doing this. # mount -t nfs -o remount /mnt/nfs # umount /mnt/nfs # umount -f /mnt/nfs # umount -l /mnt/nfs # umount -lf /mnt/nfs. This will help you to identify any processes that are still accessing the filesystem. Latest response April 30 2015 at 7:56 PM. This is how I do with schroot command on Ubuntu version 10. Alternatively, Nautilus provides Connect to server dialog, which you find by going into Files → Connect to server Jan 22, 2021 · How to unmount NFS mount that fails to unmount with ‘device is busy’. Note that destroying the log may cause corruption -- please attempt a mount. Listing currently mounted file systems. lsof /var/lib/snapd/snap/*. Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9 umount: /: target is busy (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1). Unfortunately those commands Dec 19, 2023 · Along the way, we tackled common issues users may encounter when using ‘umount’, such as the ‘target is busy’ error, and provided solutions and workarounds for each. Using any of these methods, the problem “umount target is busy” can be fixed easily. (Since 2. Conclusion. An umount command is used to unmount a device/partition by specifying the path to the directory where it has been mounted. 04. Use the `ps` command to list all of the processes that are running on the system. You may also have a look at the anwers of one of my questions, how to umount all attached usb devices with a single command: Umount all attached usb disks Bug 882351 - SystemError: (32, 'umount: /run/install/isodir: target is busy. 116 added the umount2() system call, which, like umount(), unmounts a target, but allows additional flags controlling the behav- iour of the operation: MNT_FORCE Force unmount even if busy. Jul 13, 2020 · Linux下挂载后的分区或者磁盘某些时候需要umount的时候出现类似“umount: /mnt: target is busy. 누가 사용하고있는지 확인. Try lvreduce or lvresize instead, but be very careful not to reduce too much. いろいろ調べた結果、たどり着いた解決法がこちら。. 255 heads, 63 sectors/track, 60801 cylinders. the device is found by lsof(8) or fuser(1)) RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues. 4. fuser -cu 마운트경로. Vormetric encryption was enabled for the filesystem. 17:23. Assuming that the USB drive uses the /dev/sdd1 device you can mount it to /media/usb directory by typing: sudo mount /dev/sdd1 /media/usb. Issue. umount: /root/backup: device is busy. you will get the pid (s) of running process. umount /path/to/mount. Lazy Unmount. This command attempts to unmount the filesystem associated with the device /dev/sdb1. /home is not mounted multiple times, but is spread over multiple physical volumes. We eventually removed the disk/partition from /etc/fstab so that bootup would not You can unmount the file system by using umount with the device or the mount point. Identify which processes tied to the mount need to be killed by using lsof and fuser: Sep 15, 2018 · 2. 1. I was dd'ing a Linux iso from the partition /dev/sdb4 to a USB drive. Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9 May 26, 2022 · Sometimes when you unmount a filesystem or drive, the system shows "unmount target is busy" message. You can unmount /home if it's an independent file system. May 19, 2016 · I am trying to use Ansible to remove /var from /etc/fstab without attempting to unmount the partition, I will use a reboot to make the change take affect : - name: Remove Default /var Mount mount: I mounted a remote file system using sshfs (version 2. This is a more effective way to unmount root. Umount target is busy redhat problems can use the two approaches. Phase 2 - using internal log. 김보야 2018. Cause: FibreChannel were not correctly unmounted from a node when a pod was deleted while a pod that used the volume was deleted in the API server while kubelet on the node was not running, e. $ mount. Appropriate privilege (Linux: the CAP_SYS_ADMIN capability) is required to unmount filesystems. umount -f /PATH/OF/BUSY-NFS (NETWORK-FILE-SYSTEM) NOTE/CAUTION. The filesystem is huge, so lsof +D /path is not a realistic option. Only for NFS mounts. - zero log zero_log: head block 101 tail block 101. 116 added the umount2 () system call, which, like umount (), unmounts a target, but allows additional flags controlling the An ocf:heartbeat:Filesystem resource failed to stop even though no processes were using it. Focus mode. . Red Hat Enterprise Linux ships with an utility named lsof May 11, 2014 · I was told to umount /home, mount it on a different location and copy the contents to the /home directory on the / partition. If you are attempting to unmount a NFS command like. Appropriate privilege (Linux: the CAP_SYS_ADMIN capability) is required to unmount file systems. Linux コマンド Procedure 15. This option allows a "busy" filesystem to be unmounted. Dec 26, 2023 · Here are some tips for troubleshooting the umount: target is busy error: Use the `lsof` command to list all of the open files on the filesystem. 11 or later. 1 on a fresh install, I sometimes cannot unmount my data backup partition. I used the command. Solution Unverified - Updated April 16 2018 at 3:43 PM -. ” When it comes to avoiding the common issue of “umount target is busy,” there are several you can take to ensure a smooth and hassle-free unmounting process. Solution 1: Move to a directory outside the file system mount point, and retry the umount command. The manpage has this to say about it: umount - unmount file systems. also -l or -f did not help. Disabling lock debugging due to kernel taint. Unmounting a CD. umount: /home/joeuser/example: device is busy. nfs: : device is busy umount. As a system administrator, you can mount file systems on your system to access data on them. seen with kernel 2. Note: Old hdd also had Old OS installed on it as you can see in fdisk -l. Mar 26, 2024 · Precautions to Avoid “umount target is busy. Device already mounted or resource is busy. Chapter 16. 9. 04 upward: # list all sessions: schroot --list --all-sessions. com). Consequence: While the volume is still mounted on the Linux での「Umount Target is Busy」エラーの修正. It unmounts the mount point from the Linux filesystem. Oct 14, 2018 · So basically, what I would like to do, is somehow make the umount command wait, until the device is not busy and then umount the HDD and continue executing the script. umount () and umount2 () remove the attachment of the (topmost) file system mounted on target . The message means that the filesystem on the device is in use. cdr: module license 'CommVault Systems' taints kernel. I am using the Ubuntu Rescue Remix and Ddrescue. ) I tried some different options with the command lsof and fuser , but it didn't work so far. Phase 3 - for each AG Jan 19, 2015 · It is showing in fdisk -l but when i try to mount using. このエラーを取り除くために何ができるかを学びましょう。. @AaronCopley I have tried that as well. umount: /mnt/lustre: target is busy. Cause 2: An abrupt disconnect from the file system's mount target occurred. ) – umount has an -l option to perform a lazy unmount. Detach the filesystem from the filesystem hierarchy now, and cleanup all references to the filesystem as soon as it is not busy anymore. To unmount the device, you must first stop all processes that are using it. Read man fuser. umount コマンドの使用中に発生する、それほど珍しいエラーではありませんが、「ターゲットがビジーです」というエラーがあります。. 0-x86_64-dvd. Nov 28, 2020 · The above partition is mounted as root and thus the partition cannot be unmount: # umount / umount: /: target is busy. These commands can disrupt a running process, cause data loss OR corrupt open files. What other tests should I try so that I can get to the true root cause and thus hopefully fix the stuck mount without reboot on a system I can't presently restart for a while as well as prevent this 3. because of a crash. $ umount: /mnt/data: device is busy. Raw. If you run. I am in the process of creating a RAW image onto a 'good' drive (sdc) from a 'bad' drive (sdc). /example. sudo umount /media/usb. target is busy. Dec 8, 2020 · Sometimes when we want to "umount" a filesystem, we get a "device busy" message. Suppose the your usb is /dev/sdb1 then you could also do. -f, --force Force an unmount (in case of an unreachable NFS system). If you're not, please head to the "RHEL project" in Red Hat Jira and file Red Hat Customer Portal - Access to 24x7 support and knowledge. English. LVM linear LV with single device (sdb) iSCSI device. umount(8) says that a file system is busy Reboot hangs when NFS share is mounted and lost connection to NFS server during I/O operation. /dev/sdb = Old HDD. The mount will be removed from the filesystem namespace (so you won't see it under /mnt/Zia/src anymore, in the example) but it stays mounted, so programs accessing it can continue to do so. iso /media/iso All done. Jan 10, 2019 · 4. the device is found by lsof(8) or fuser(1)) A Filesystem resource that is used as an nfs_shared_infodir for an nfsserver resource fails to stop with "ERROR: Couldn't unmount /<path>/rpc_pipefs; trying cleanup with TERM" in a RHEL 7 High Availability cluster. 6) Ext4. For example: $ df -hT. If you're not, please head to the " RHEL project " in Umount target is busy redhat problems can use the two approaches. iso located within our current working directory: $ ls rhel-8. The umount command detaches the mentioned filesystem(s) from the. Nov 19, 2013 · From that point forward, the /home partition has been in a state where we are unable to fsck it, mount it, or umount it. (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1)) All what needs to be done is take a note of a starting sector of a current partition, which in our case is 4096. $ umount2: Device or resource busy. While shutting down the system, hitting the message: Raw. Mount the filesystem to replay the log, and unmount it before. 8. Well I have the "Finished" command on screen so I am trying to unmount my good drive, before a reboot by May 1, 2015 · umount command fails during system shutdown. automount[20340]: do_umount_autofs_direct: ask umount returned busy for /mnt/point Environment. el6 (RHEL6. If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. The lsof command, without options, doesn't print the device on which a file is located, therefore your grepping for nvme returns nothing. Sometimes, when you run the umount command you may receive the “ target is busy ” or “ device is busy ” errors indicating that there is some process that is using the I have an NFS-mounted directory on a Linux machine that has hung. cd /test_dir. を実行 Nov 21, 2023 · In Linux, umount is the command used to unmount a mounted filesystem. The remount option is used when the file system isn't currently in use to modify the mount option from ro to rw. To fix umount target is busy error, a methodical way is the Lazy unmount. Nov 1, 2020 · Option 1: Force unmount. " Change directory to outside the mounted path. 116 or later. Linux umount May 2, 2022 · Umount: Force – Target | Device is Busy. -l オプションは、すぐにシステムから切り離して新規のアクセスを禁じ、現在実行している参照が全てなくなった Feb 16, 2021 · umount target is busy. So, if you suspect something is still running in a chroot, use Sudo ls -l /proc/*/root | grep chroot. \n (In some cases useful info about processes that use\n the device is found by lsof(8) or fuser(1))') Jul 23, 2015 · Links; System ID Private Priority Status Summary Last Updated; Red Hat Product Errata RHBA-2015:2183: 0 normal SHIPPED_LIVE libguestfs bug fix and enhancement update Nov 6, 2010 · So to unmount just kill that pids and re-try the unmount. file hierarchy. Linux 2. cat /proc/<pid>/cmdline. When I try to do so, I get a message: umount: /home device is busy (which processes use this device can be possibly be found with lsof or fuser) Feb 23, 2019 · 3. RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira ( issues. The “umount target is busy” issue occurs due to the device being in use by various processes at the time of unmounting. To remove all the processes attached to the device (that are not in use) slowly, you can use this solution. You may cleanup all later: umount -l /PATH/OF/BUSY-DEVICE. sudo umount /dev/sdb1. Nov 12, 2017 · The remount functionality follows the standard way how the mount command works with options from fstab. Phase 1 - find and verify superblock - block cache size set to 89000 entries. To find the device and filesystem type, you can use any of the following commands: fdisk -l ls -l /dev/disk/by-id/usb* dmesg lsblk. マウント先に cd しているユーザーが存在していることが原因で、umount コマンドを実行するとエラーが発生して、アンマウントすることができませんでした。 例えば、以下の場合、エラーが発生します。 ユーザ Aが. 116. Without the first command, you risk unmounting all the sub-mounts on the source, due to mount propagation. When running umount /path I get: umount: /path: device is busy. I've tried to force an unmount, but it doesn't seem to work: $ umount -f /mnt/data. 116 added the umount2 () system call, which, like umount (), unmounts a target, but allows additional flags controlling the behavior of the operation: MNT_FORCE (since Linux 2. 1 not responding, still trying Unmounting NFS filesystems: umount. /dev/sda = New HDD. What is unmount target busy. For example : cat /proc/11086/cmdline. In this case that means all the sub-mounts of /dev, which would have automount[20340]: do_umount_autofs_direct: ask umount returned busy for /mnt/point Environment. \n (In some cases useful info about processes that use\n the device is found by lsof(8) or fuser(1))') Summary: SystemError: (32, 'umount: /run/install/isodir: target is busy. Also read man lsof. A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more. Share. If I type " mount ", it appears that the directory is no longer mounted, but it hangs if I do " ls /mnt/data ", and if I Feb 15, 2021 · lvextend can only increase the size. Mar 10, 2017 · [RHEL] Unable to mount a filesystem, the mount command claims the volume is already mounted or the mount point is busy. We also took a step back to understand the fundamentals of file systems, and the concepts of mounting and unmounting, which underlie the ‘umount’ command. I have tried, but I cannot umount /home. Discover effective methods to identify and terminate processes holding the mount point, force unmount, and troubleshoot related issues in shared mount points, NFS, remote filesystems, and virtual environments. re-running xfs_check. Copy. "Perform a lazy unmount: make the mount point unavailable for new accesses, immediately disconnect the filesystem and all filesystems mounted below it from each other and from the mount table, and actually perform the unmount when the mount point ceases to be busy. fuser -v /path gives: USER PID ACCESS COMMAND /path: root kernel mount /path which is normal for all unused mounted file systems. A filesystem is specified by giving the directory. (Requires kernel 2. umount /media/hdd1 # Device umounted without any problems continuing the script. com ). In the location bar at the top of your screen, enter a well-formed URI string. The Linux mount mechanism. sudo umount /media/KINGSTON. sudo kill -9 3106 11086. Mostly seen nfs disconnection log. -l Lazy unmount. For example: umount /dev/sdb1. To know what is the full command line: ps uww <PID>. The ISO image is now mounted. umount states that it's not mounted, yet mount/fsck indicate that it is busy or already mounted. # if the above command does not work, just type `mount`. Aug 24, 2018 · In order to unmount a filesystem, you must unmount its submounts first (and the same for their submounts, recursively). You can always use the df command or mount command to list mounted file systems under Linux and Unix. Nov 2, 2014 · Login using a Red Hat Bugzilla account umount /usr failed, because /usr is busy on boot time Keywords: Target Milestone:--- Oct 4, 2012 · Bug 863182 - SystemError: (32, 'umount: /mnt/sysimage: target is busy. Jan 8, 2024 · Linux fuser command to forcefully unmount a disk partition. The problem can be resolved in 3 ways. mount mount process exited, code Column 1 Column 2 Column 3; umount: target is busy: The target device or filesystem is currently in use by another process. (In some cases useful info about processes that use. Apr 17, 2021 · When I try to unmount it with sudo umount /media/Nas6To i get a message telling me that the device is busy, and I cannot unmount it: thomas@NZXT:~$ sudo umount /media/Nas6To umount: /media/Nas6To: the target is active. lsof /path, lsof +f -- /path, and fuser /path all return nothing. 3rd party kernel module: CommVault Continuous Data Replicator. Apr 26, 2014 · None of the above tests have results that point to filesystem use, however umount -f still complains "Device or resource busy" / "device is busy". redhat. Mounting file systems. It means the mount command doesn't read fstab (or mtab) only when a device and dir are fully specified. > fusermount -u example. Column 1 Column 2 Column 3; umount / target is busy: Description: The umount command failed to unmount the / directory because it is still in use by another process. 4) sshfs -o allow_root joeuser@example. それでもアンマウントできない場合， -l オプションを追加すると大抵うまくいきます．. Jan 17, 2015 · 1. Use sudo lsof +D /dev/sdX (where " sdX " is your disk. Technique 4. 问题原因 ：. It never unmounts just sits there forever. 1. Also, if you are in the mounted directory that's considered to be "in use. The Target is busy message means that there are either: files under /home that are still open. \n (In Description. 6. umount -l /sdd. Note: To find the exact application name of these pids you may use this command. filesystem lives may also work, but is obsolete, mainly because. sudo ddrescue -r 3 /dev/sdb image log. The bind mount. Mar 18 09:07:30 node2 Filesystem(dataset_pdm)[31768]: ERROR: Couldn't unmount /opt/datasets01_pdm; trying cleanup with TERM Mar 18 09:07:30 node2 Filesystem(dataset_pdm)[31768]: INFO: No processes on /opt/datasets01_pdm were signalled. # points with something like this in the mount path is the session name you want to get: Mar 12, 2023 · 2. Solution Unverified - Updated 2017-03-10T04:21:35+00:00 - Apr 28, 2021 · Summary: FC volume is marked as unmounted after failed reconstruction. In this guide, we learn how to fix umount target is busy in Linux. umount /media/hdd2 # Device is busy! Aug 19, 2012 · Suppose your usb drive is mounted to /media/usb then it would be sufficient to do. Unmounting pipe file systems: [ OK ] Unmounting file systems: umount : /backup: device is busy umount: /backup: device is busy [FAILED] Unmounting file systems (retry): umount2: Device or resource busy umount: /backup: device is busy umount2: Device or resource busy umount: /backup: device is busy [FAILED] Unmounting file systems (retry): umount2 sudo umount /path/mymount but it always already hang when i typed sudo umount /path/mymoun - so couldn't type the last t and press return as it seems the system tries to read the directory. # unmount /mnt/cdrom unmount: /mnt/cdrom device is busy This is usually because a process is still using a resource on the mounted device. At least, it appears to (-l means Lazy Unmount, Detach the filesystem from the filesystem hierarchy now, and cleanup all references to the filesystem as soon as it is not busy anymore. umount -l /path/to/mount. 3. A mounted filesystem can be accessed by any process running on the Linux operating $ umount -l /device-path. where it has been mounted. I had this problem recently and neither fuser or lsof would show anything using the device, but umount -l allowed me to unmount it. to begin the back-up process. 该报错通常是由于待卸载磁盘正在使用，导致无法直接卸载。. This procedure describes how to list all currently mounted file systems on the command line. the device is found by lsof (8) or fuser (1)) [s1: ~]#. Apr 3, 2023 · To achieve this, run: fuser -kmv /Path/ to /target. To unmount a CD that was previously mounted to the /media/cdrom/ directory, type the following Oct 27, 2020 · umount时目标忙的解决办法 一、第一种情况是可能你当前所在路径已经在挂载目录下，需要切换到别的目录才能umount成功。二、第二种情况是没有在挂载目录，但是umount时，始终无法umonut，可以通过fuser查看设备被哪个进程占用，之后杀死进程，就可以顺利umount了。 Mar 21, 2023 · Unmounting ( umount) fails with a message: device is busy. There are options of umount to detach a busy device immediately even if the device is busy. ) The -f option is for unreachable NFS system. 3. I have found on different post using fuser and lsof to identify the process keeping it busy. Disk /dev/sda: 500. If /mnt/win is not being used, umount will wait until it can unmount it. Open a file in Nautilus (that is, the Files application). 2. The “l” represents the lazy unmount in the device. 原因. 4. ”等字样，或者“umount: /xxx: device is busy. Suppose you have /dev/sda1 mounted on /mnt directory then you can use fuser command as follows: WARNING! Aug 23, 2019 · sudo mkdir -p /media/usb. 26. Unless you release the busy system, you won't be able to unmount. Manual Mounting. this will output something like below. iso Once ready mount the ISO image to the previously created mount point by using the mount command: # mount -t iso9660 -o loop rhel-8. 16. Hello, I have a problem with a file system that I cannot unmount: [s1: ~]# umount /root/backup. what worked for me - instead of entering the whole path, i used wildcard: sudo umount -f /path/mymo* Bug 832736 - SystemError: (32, 'umount: /mnt/sysimage: target is busy. However, if the offending process runs in chroot, lsof and fuser cannot find it. Procedure. ) To determine which processes are accessing the file system, use the fuser command in the following form: For example, to list the processes that are accessing a file system mounted to the /media/cdrom/ directory, type: Example 2. ) To determine which processes are accessing the file system, use the fuser command in the following form: For example, to list the processes that are accessing a file system mounted to the /media/cdrom/ directory, type: Example 18. 需要将当前使用数据盘的进程杀掉，才能卸载 Linux 2. - scan filesystem freespace and inode maps agi unlinked bucket 3 is 67 in ag 0 (inode=67) - found root inode chunk. The lsof command displays the files that are open on a certain filesystem: The mount point of the filesystem could be for example : /usr . directories under /home that are the CWD of some process (this could be the shell from which you try to unmount /home) a filesystem mounted on a mount point under /home. When the last program accessing it exits, the unmount will actually occur. nfs: server 1. force_unmount Aug 2, 2018 · Aug 01 16:55:19 mymachine umount[353194]: umount: /vols/data5: target is busy. The command displays all the processes using the filesystem. Linux. Later, I exited the terminal, and Jun 8, 2017 · When I umount Lustre FS it displays: [root@cn17663-ens4 mnt]# umount /mnt/lustre. umount -R m. For example: Cause 1: You're attempting to run the umount command from within the mountpoint directory. but unmounting it fails. Bug 895857 - SystemError: (32, 'umount: /mnt/sysimage: target is busy. nfs: : device is busy [FAILED] Unmounting NFS filesystems (retry): [ OK ] The issue occurs if the mount option is hard mount . It would thus work like this: #!/bin/bash. To limit the listed file systems only to a certain file system type, add the --types option: Red Hat Enterprise Linux 6. For example to unmount a file system (dev/sdd1) mounted at /data, you could enter one of the following: # umount /data. aa vw fz pp qz rc zy qh ep cm