Cisco Nexus 9000 Series NX-OS Fundamentals Configuration
Guide, Release 7.x - Using the Device File Systems, Directories, and
Files [Cisco Nexus 9000 Series Switches]
Published: 2025-05-14 · Archived: 2026-04-06 01:18:17 UTC
Using the Device File Systems, Directories, and Files
This chapter contains the following sections:
About the Device File Systems, Directories, and Files
This section describes file systems, directories, and files on the Cisco NX-OS device.
File Systems
The syntax for specifying a local file system is filesystem:[//modules/] .
This table describes file systems that you can reference on your device.
Table 1. File System Syntax Components
File System
Name
Module Description
bootflash
sup-active
sup-local
Internal CompactFlash memory located on the active supervisor module used
for storing image files, configuration files, and other miscellaneous files. The
initial default directory is bootflash.
sup-standby
sup-remote
Internal CompactFlash memory located on the standby supervisor module used
for storing image files, configuration files, and other miscellaneous files.
volatile —
Volatile random-access memory (VRAM) located on a supervisor module used
for temporary or pending changes.
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File System
Name
Module Description
log — Memory on the active supervisor that stores logging file statistics.
system — Memory on a supervisor module used for storing the running-configuration file.
debug — Memory on a supervisor module used for debug logs.
Directories
You can create directories on bootflash: and external flash memory (usb1: and usb2:). You can navigate through
these directories and use them for files.
Files
You create and access files on bootflash:, volatile:, usb1:, and usb2: filesystems. You can only access files on the
system: filesystem. You can use the log: filesystem for debug log files.
You can download files, such as the nx-os image file, from remote servers using FTP, Secure Copy (SCP), Secure
Shell FTP (SFTP), and TFTP. You can also copy files from an external server to the device, because the device can
act as an SCP server.
Default Settings for File System Parameters
This table lists the default settings for the file system parameters.
Table 2. Default File System Settings
Parameters Default
Default filesystem bootflash:
Configuring the FTP, HTTP, or TFTP Source Interface
You can configure the source interface for the File Transfer Protocol (FTP), Hypertext Transfer Protocol (HTTP),
or Trivial File Transfer Protocol (TFTP). This configuration allows you to use the IP address associated with the
configured source interface when copy packets are transferred.
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Procedure
  Command or Action Purpose
Step 1
configure terminal
Example:
switch# configure terminal
switch(config)#
Enters global configuration
mode.
Step 2
[no] ip {ftp | http | tftp} source-interface {ethernet slot/port |
loopback number}
Example:
switch(config)# ip tftp source-interface ethernet 2/1
Configures the source
interface for all FTP, HTTP, or
TFTP packets.
Step 3
(Optional) copy running-config startup-config
Example:
switch(config)# copy running-config startup-config
(Optional)
Copies the running
configuration to the startup
configuration.
Working with Directories
This section describes how to work with directories on the Cisco NX-OS device.
Identifying the Current Directory
You can display the directory name of your current directory.
Procedure
Command or Action Purpose
pwd
Example:
Displays the name of your current directory.
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Command or Action Purpose
switch# pwd
Changing the Current Directory
You can change the current directory for file system operations. The initial default directory is bootflash:.
Procedure
  Command or Action Purpose
Step 1
(Optional) pwd
Example:
switch# pwd
(Optional)
Displays the name of your current default directory.
Step 2
cd {directory | filesystem:[//module/]
[directory]}
Example:
switch# cd usb1:
Changes to a new current directory. The file system,
module, and directory names are case sensitive.
Creating a Directory
You can create directories in the bootflash: and flash device file systems.
Procedure
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Command or Action Purpose
Step 1
(Optional) pwd
Example:
switch# pwd
(Optional)
Displays the name of your current default directory.
Step 2
(Optional) cd {directory |
filesystem:[//module/][directory]}
Example:
switch# cd slot0:
(Optional)
Changes to a new current directory. The file system, module,
and directory names are case sensitive.
Step 3
mkdir [filesystem:
[//module/]]directory
Example:
switch# mkdir test
Creates a new directory. The filesystem argument is case
sensitive. The directory argument is alphanumeric, case
sensitive, and has a maximum of 64 characters.
Displaying Directory Contents
You can display the contents of a directory.
Procedure
Command or Action Purpose
dir [directory | filesystem:[//module/]
[directory]]
Example:
switch# dir bootflash:test
Displays the directory contents. The default is the current working
directory. The file system and directory names are case sensitive.
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Deleting a Directory
You can remove directories from the file systems on your device.
Before you begin
Ensure that the directory is empty before you try to delete it.
Procedure
  Command or Action Purpose
Step 1
(Optional) pwd
Example:
switch# pwd
(Optional)
Displays the name of your current default directory.
Step 2
(Optional) dir [filesystem :[//module/]
[directory]]
Example:
switch# dir bootflash:test
(Optional)
Displays the contents of the current directory. The file
system, module, and directory names are case sensitive.
If the directory is not empty, you must delete all the
files before you can delete the directory.
Step 3
rmdir [filesystem :[//module/]]directory
Example:
switch# rmdir test
Deletes a directory. The file system and directory name
are case sensitive.
Accessing Directories on the Standby Supervisor Module
You can access all file systems on the standby supervisor module (remote) from a session on the active supervisor
module. This feature is useful when copying files to the active supervisor modules requires similar files to exist on
the standby supervisor module. To access the file systems on the standby supervisor module from a session on the
active supervisor module, you specify the standby supervisor module in the path to the file using either
filesystem://sup-remote/ or filesystem://sup-standby/ .
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Working with Files
This section describes how to work with files on the Cisco NX-OS device.
Moving Files
You can move a file from one directory to another directory.
Caution
If a file with the same name already exists in the destination directory, that file is overwritten by
the moved file.
You can use the move command to rename a file by moving the file within the same directory.
Procedure
  Command or Action Purpose
Step 1
(Optional) pwd
Example:
switch# pwd
(Optional)
Displays the name of your current
default directory.
Step 2
(Optional) dir [filesystem:[//module/][directory]]
Example:
switch# dir bootflash
(Optional)
Displays the contents of the current
directory. The file system and directory
name are case sensitive.
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Command or Action Purpose
Step 3
move [filesystem:[//module/][directory /] |
directory/]source-filename {{filesystem:[//module/]
[directory /] | directory/}[target-filename] | target-filename}
Example:
switch# move test old_tests/test1
Moves a file.
The file system, module, and directory
names are case sensitive.
The target-filename argument is
alphanumeric, case sensitive, and has a
maximum of 64 characters. If the target-filename argument is not specified, the
filename defaults to the source-filename
argument value.
Copying Files
You can make copies of files, either within the same directory or on another directory. For more information, see
the Cisco Nexus 9000 Series NX-OS Troubleshooting Guide.
Note
Use the dir command to ensure that enough space is available in the target file system. If enough
space is not available, use the delete command to remove unneeded files.
Procedure
  Command or Action Purpose
Step 1
(Optional) pwd
Example:
switch# pwd
(Optional)
Displays the name of your current default
directory.
Step 2
(Optional) dir [filesystem:[//module/][directory]]
Example:
switch# dir bootflash
(Optional)
Displays the contents of the current directory.
The file system and directory name are case
sensitive.
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Command or Action Purpose
Step 3
copy [filesystem:[//module/][directory/] |
directory/]source-filename | {filesystem:
[//module/][directory/] | directory/}[target-filename]
Example:
switch# copy test old_tests/test1
Copies a file. The file system, module, and
directory names are case sensitive. The
source-filename argument is alphanumeric,
case sensitive, and has a maximum of 64
characters. If the target-filename argument is
not specified, the filename defaults to the
source-filename argument value.
Deleting Files
You can delete a file from a directory.
Procedure
  Command or Action Purpose
Step 1
(Optional) dir [filesystem:[//module/][directory]]
Example:
switch# dir bootflash:
(Optional)
Displays the contents of the current directory.
The file system and directory name are case
sensitive.
Step 2
delete {filesystem:[//module/][directory/] |
directory/}filename
Example:
switch# delete bootflash:old_config.cfg
Deletes a file. The file system, module, and
directory names are case sensitive. The source-filename argument is case sensitive.
Caution
 
If you specify a directory, the
delete command deletes the
entire directory and all its
contents.
Displaying File Contents
You can display the contents of a file.
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Procedure
Command or Action Purpose
show file [filesystem:[//module/]][directory/]filename
Example:
switch# show file bootflash:test-results
Displays the file contents.
Displaying File Checksums
You can display checksums to check the file integrity.
Procedure
Command or Action Purpose
show file [filesystem:[//module/]][directory/]filename {cksum |
md5sum}
Example:
switch# show file bootflash:trunks2.cfg cksum
Displays the checksum or MD5
checksum of the file.
Compressing and Uncompressing Files
You can compress and uncompress files on your device using Lempel-Ziv 1977 (LZ77) coding.
Procedure
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Command or Action Purpose
Step 1
(Optional) dir [filesystem:
[//module/]directory]]
Example:
switch# dir bootflash:
(Optional)
Displays the contents of the current directory. The
file system and directory name are case sensitive.
Step 2
gzip [filesystem:[//module/][directory/] |
directory/]filename
Example:
switch# gzip show_tech
Compresses a file. After the file is compressed, it
has a .gz suffix.
Step 3
gunzip [filesystem:[//module/][directory/] |
directory/]filename .gz
Example:
switch# gunzip show_tech.gz
Uncompresses a file. The file to uncompress must
have the .gz suffix. After the file is uncompressed, it
does not have the .gz suffix.
Displaying the Last Lines in a File
You can display the last lines of a file.
Procedure
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Command or Action Purpose
tail [filesystem:[//module/]]
[directory/]filename [lines]
Example:
switch# tail ospf-gr.conf
Displays the last lines of a file. The default number of lines is
10. The range is from 0 to 80 lines.
Redirecting show Command Output to a File
You can redirect show command output to a file on bootflash:, volatile:, or a remote server. You can also specify
the format for the command output.
Procedure
  Command or Action Purpose
Step 1
(Optional) terminal redirection-mode {ascii | zipped}
Example:
switch# terminal redirection-mode zipped
(Optional)
Sets the redirection mode for the
show command output for the user
session. The default mode is ascii .
Step 2
show-command > [filesystem:[//module/][directory] |
[directory /]]filename
Example:
switch# show tech-support > bootflash:techinfo
Redirects the output from a show
command to a file.
Finding Files
You can find the files in the current working directory and its subdirectories that have names that begin with a
specific character string.
Procedure
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Command or Action Purpose
Step 1
(Optional) pwd
Example:
switch# pwd
(Optional)
Displays the name of your current default
directory.
Step 2
(Optional) cd {filesystem:[//module/]
[directory] | directory}
Example:
switch# cd bootflash:test_scripts
(Optional)
Changes the default directory.
Step 3
find filename-prefix
Example:
switch# find bgp_script
Finds all filenames in the default directory and in
its subdirectories beginning with the filename
prefix. The filename prefix is case sensitive.
Formatting the Bootflash
Use the format bootflash: CLI command to format the onboard flash memory (bootflash:). If the command errors
out due to the Deactivate all virtual-services and try again error message, destroy the Guest Shell
using the guestshell destroy CLI command and rerun the format bootflash: command, for example,
switch# sh virtual-service list
Virtual Service List:
 
Name Status Package Name
-----------------------------------------------------------------------
guestshell+ Activated guestshell.ova
 
switch#
switch# guestshell destroy
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You are about to destroy the guest shell and all of its contents. Be sure to save your work. Are you sure you w
switch# 2018 Jan 17 18:42:24 switch %$ VDC-1 %$ %VMAN-2-ACTIVATION_STATE: Deactivating virtual service 'guestshe
switch#format bootflash:
Working with Archive Files
The Cisco NX-OS software supports archive files. You can create an archive file, append files to an existing
archive file, extract files from an archive file, and list the files in an archive file.
Creating an Archive File
You can create an archive file and add files to it. You can specify the following compression types:
bzip2
gzip
Uncompressed
The default is gzip.
Procedure
Command or Action Purpose
tar create {bootflash: | volatile:}archive-filename [absolute] [bz2-compress] [gz-compress] [remove] [uncompressed] [verbose] filename-list
Example:
switch# tar create bootflash:config-archive gz-compress bootflash:config-file
Creates an archive file
and adds files to it.
The filename is
alphanumeric, not
case sensitive, and has
a maximum length of
240 characters.
The absolute keyword
specifies that the
leading backslash
characters (\) should
not be removed from
the names of the files
added to the archive
file. By default, the
leading backslash
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Command or Action Purpose
characters are
removed.
The bz2-compress ,
gz-compress , and
uncompressed
keywords determine
the compression
utility used when files
are added, or later
appended, to the
archive and the
decompression utility
to use when extracting
the files. If you do not
specify an extension
for the archive file,
the defaults are as
follows:
For bz2-
compress , the
extension is
.tar.bz2.
For gz-compress , the
extension is
.tar.gz.
For
uncompressed
, the extension
is .tar.
The remove keyword
specifies that the
Cisco NX-OS
software should delete
the files from the file
system after adding
them to the archive.
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Command or Action Purpose
By default, the files
are not deleted.
The verbose keyword
specifies that the
Cisco NX-OS
software should list
the files as they are
added to the archive.
By default, the files
are listed as they are
added.
Appending Files to an Archive File
You can append files to an existing archive file on your device.
Before you begin
You have created an archive file on your device.
Procedure
Command or Action Purpose
tar append {bootflash: |
volatile:}archive-filename [absolute]
[remove] [verbose] filename-list
Adds files to an existing archive file. The archive filename is not
case sensitive.
The absolute keyword specifies that the leading backslash
characters (\) should not be removed from the names of the files
added to the archive file. By default, the leading backslash
characters are removed.
The remove keyword specifies that the Cisco NX-OS software
should delete the files from the filesystem after adding them to the
archive. By default, the files are not deleted.
The verbose keyword specifies that the Cisco NX-OS software
should list the files as they are added to the archive. By default, the
files are listed as they are added.
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Example
This example shows how to append a file to an existing archive file:
switch# tar append bootflash:config-archive.tar.gz bootflash:new-config
Extracting Files from an Archive File
You can extract files to an existing archive file on your device.
Before you begin
You have created an archive file on your device.
Procedure
Command or Action Purpose
tar extract {bootflash: | volatile:}archive-filename [keep-old]
[screen] [to {bootflash: | volatile:}[/directory-name]] [verbose]
Example:
switch# tar extract bootflash:config-archive.tar.gz
Extracts files from an existing archive
file. The archive filename is not case
sensitive.
The keep-old keyword indicates that
the Cisco NX-OS software should not
overwrite files with the same name as
the files being extracted.
The screen keyword indicates that the
Cisco NX-OS software should not
overwrite files with the same name as
the files being extracted.
The to keyword specifies the target
filesystem. You can include a directory
name. The directory name is
alphanumeric, case sensitive, and has a
maximum length of 240 characters.
The verbose keyword specifies that the
Cisco NX-OS software should display
the names of the files as they are
extracted.
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Displaying the Filenames in an Archive File
You can display the names of the files in an archive files using the tar list command.
tar list {bootflash: | volatile:}archive-filename
The archive filename is not case sensitive.
switch# tar list bootflash:config-archive.tar.gz
config-file
new-config
Examples of Using the File System
This section includes examples of how to use the file system on the Cisco NX-OS device.
Accessing Directories on Standby Supervisor Modules
This example shows how to list the files on the standby supervisor module:
switch# dir bootflash://sup-remote
 4096 Oct 03 23:55:55 2013 .patch/
...
 16384 Jan 01 13:23:30 2011 lost+found/
 297054208 Oct 21 18:55:36 2013 n9000-dk9.6.1.2.I1.1.bin
...
Usage for bootflash://sup-remote
1903616000 bytes used
19234234368 bytes free
21137850368 bytes total
This example shows how to delete a file on the standby supervisor module:
switch# delete bootflash://sup-remote/aOldConfig.txt
 
Moving Files
This example shows how to move a file on an external flash device:
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switch# move usb1:samplefile usb1:mystorage/samplefile
 
This example shows how to move a file in the default file system:
switch# move samplefile mystorage/samplefile
 
Copying Files
This example shows how to copy the file called samplefile from the root directory of the usb1: file system to the
mystorage directory:
switch# copy usb1:samplefile usb1:mystorage/samplefile
This example shows how to copy a file from the current directory level:
switch# copy samplefile mystorage/samplefile
This example shows how to copy a file from the active supervisor module bootflash to the standby supervisor
module bootflash:
switch# copy bootflash:nx-os-image bootflash://sup-2/nx-os-image
 
This example shows how to overwrite the contents of an existing configuration in NVRAM:
switch# copy nvram:snapshot-config nvram:startup-config
 
Warning: this command is going to overwrite your current startup-config:
Do you wish to continue? {y/n} [y] y
 
You can also use the copy command to upload and download files from the bootflash: file system to or from a
FTP, TFTP, SFTP, or SCP server.
Deleting a Directory
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You can remove directories from the file systems on your device.
Before you begin
Ensure that the directory is empty before you try to delete it.
Procedure
  Command or Action Purpose
Step 1
(Optional) pwd
Example:
switch# pwd
(Optional)
Displays the name of your current default directory.
Step 2
(Optional) dir [filesystem :[//module/]
[directory]]
Example:
switch# dir bootflash:test
(Optional)
Displays the contents of the current directory. The file
system, module, and directory names are case sensitive.
If the directory is not empty, you must delete all the
files before you can delete the directory.
Step 3
rmdir [filesystem :[//module/]]directory
Example:
switch# rmdir test
Deletes a directory. The file system and directory name
are case sensitive.
Displaying File Contents
This example shows how to display the contents of a file on an external flash device:
switch# show file usb1:test
configure terminal
interface ethernet 1/1
no shutdown
end
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show interface ethernet 1/1
This example shows how to display the contents of a file that resides in the current directory:
switch# show file myfile
Displaying File Checksums
This example shows how to display the checksum of a file:
switch# show file bootflash:trunks2.cfg cksum
583547619
This example shows how to display the MD5 checksum of a file:
switch# show file bootflash:trunks2.cfg md5sum
3b94707198aabefcf46459de10c9281c
Compressing and Uncompressing Files
This example shows how to compress a file:
switch# dir
 1525859 Jul 04 00:51:03 2013 Samplefile
...
switch# gzip volatile:Samplefile
switch# dir
 266069 Jul 04 00:51:03 2013 Samplefile.gz
...
This example shows how to uncompress a compressed file:
switch# dir
 266069 Jul 04 00:51:03 2013 Samplefile.gz
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/fundamentals/configuration/guide/b_Cisco_Nexus_9000_Series_NX-OS_Fundamentals_Configuration_Guide_7x/b_Cisco_Nexus_9000_Series_NX-OS_Fundamentals_Configuration_Guide_7x_chapter_01000.html
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...
switch# gunzip samplefile
switch# dir
 1525859 Jul 04 00:51:03 2013 Samplefile
...
Redirecting show Command Output
This example shows how to direct the output to a file on the bootflash: file system:
switch# show interface > bootflash:switch1-intf.cfg
This example shows how to direct the output to a file on external flash memory:
switch# show interface > usb1:switch-intf.cfg
This example shows how to direct the output to a file on a TFTP server:
switch# show interface > tftp://10.10.1.1/home/configs/switch-intf.cfg
Preparing to copy...done
This example shows how to direct the output of the show tech-support command to a file:
switch# show tech-support > Samplefile
Building Configuration ...
switch# dir
 1525859 Jul 04 00:51:03 2013 Samplefile
Usage for volatile://
 1527808 bytes used
 19443712 bytes free
 20971520 bytes total
Finding Files
This example shows how to find a file in the current default directory:
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/fundamentals/configuration/guide/b_Cisco_Nexus_9000_Series_NX-OS_Fundamentals_Configuration_Guide_7x/b_Cisco_Nexus_9000_Series_NX-OS_Fundamentals_Configuration_Guide_7x_chapter_01000.html
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switch# find smm_shm.cfg
/usr/bin/find: ./lost+found: Permission denied
./smm_shm.cfg
./newer-fs/isan/etc/routing-sw/smm_shm.cfg
./newer-fs/isan/etc/smm_shm.cfg
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Source: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/fundamentals/configuration/guide/b_Cisco_Nexus_9000
_Series_NX-OS_Fundamentals_Configuration_Guide_7x/b_Cisco_Nexus_9000_Series_NX-OS_Fundamentals_Configuration_Guide_7x_cha
pter_01000.html
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/fundamentals/configuration/guide/b_Cisco_Nexus_9000_Series_NX-OS_Fundamentals_Configuration_Guide_7x/b_Cisco_Nexus_9000_Series_NX-OS_Fundamentals_Configuration_Guide_7x_chapter_01000.html
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