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added 'more/less' and 'wc'

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Pat Beirne
2021-04-15 08:42:35 -04:00
parent b30f1b5bb9
commit 79adae017f
3 changed files with 83 additions and 42 deletions
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8
README.md
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@@ -239,8 +239,7 @@ sed <pattern> <filename>
help
```
You can also use `copy`, `move`, `del`, `list` and `ls` as synonyms for
`cp`, `mv`, `rm`, `cat` and `dir` . The `mv` can rename directories.
You can use synonyms for these: `copy = cp`, `move = rename = mv`, `del = rm`, `list = cat`, `ls = dir`. The `mv/move/rename` can rename directories.
For the `cat/list` command, you can enable line numbers with `-n` and you can limit the display range with `-l n-m` where `n` and `m` are decimal numbers (and n should be less than m). These are all valid uses of `cat`
@@ -378,11 +377,14 @@ host <domain.name> # do an DNS lookup
freq [160 | 80] # get/set the ESP8266 frequency
exec <python-filename> # execute a small python file
free # display the heap size: used + free
wc <filename> # display the line count, word count and bytes
less <filename> # similar to cat, but displays 30 lines at a time
```
Synonyms: `ip = ifconfig`, `more = less`, `dig = nslookup = host`
The `tf.py` module checks to see if the `tf_extend.py` files exists, and forwards unknown commands to it. The `help` system also extends when the extension file exists.
Installing the extensions module uses about 2k of flash/disk space and 2kB of heap ram.
Installing the extensions module uses about 3k of flash/disk space and 4kB of heap ram.
## Performance