SSR-1U User’s Manual
Rev -, 27 Dec 2019
© 2019 Slerj, LLC
17
www.slerj.com
4.1
System Commands
System commands provide access to general system functions including the real time clock and
operational status.
Table 6. System Commands
Command
Aliases Description
cls
clear
Clears the screen.
date [
yyyymmdd
]
Sets the current date to the year, month, and day specified. If
no date is specified, this command returns the current date.
help
?
Provides help for using the shell.
reset
Performs a device reset.
status
stat
Displays device status (date/time, inputs, record channels).
time
[
hhmmss
][
ap
]
Sets the current time using the hour, minute, and second
specified. The hour is assumed to be in 24 hour format.
However, the time may be appended with an ‘a’ or ‘p’ to
explicitly identify AM or PM if a 12 hour format is used.
4.2
File Commands
File commands provide access to the SD card file system. FAT12, FAT16 and FAT32 volumes
are supported, and long filenames are supported on FAT32. Many file system commands require
a
path
. Both relative and absolute paths are supported in the shell. Directories are separated by a
forward slash (/).
Table 7. File Commands
Command
Aliases Description
chdir <
path
>
cd
Changes the current working directory.
del <
path
>
rm
Removes a file or an empty directory.
df
Prints the volume size and free space -.
dir [
path
]
ls
Lists the contents of a directory. If no path is provided,
this command lists the contents of the current directory.
mkdir <
path
>
md
Creates a directory.
pwd
Prints the current working directory.
ren <
path1
> <
path2
>
mv,rn
Moves or renames a file or directory from
path1
to
path2
.
[NOTE: Do not move open files]
touch <
path
>
Updates the timestamp on a file or directory.
sz <
path
>
Send a file to the connected terminal
1
using the zmodem
protocol.
1
The zmodem file transfer has been tested successfully with several freely available terminal emulators, including
ExtraPutty, Teraterm, SyncTERM, and qodem.