37.- sleep ::: sort
sleep 4
sort, sorts lines of text files. It supports sorting alphabetically, in reverse order, by number, by month and can also remove duplicates.
sort /mnt/sdcard/numeros.txt
sort /mnt/sdcard/numeros.txt > /mnt/scdard/sort_numeros.txt
sort -r /mnt/sdcard/numeros.txt (reverse)
sort -u /mnt/sdcard/numeros.txt (no duplicates)
sort -k 2 -t , /mnt/sdcard/numeros.txt
38.- split
split a file.
We have a file image.png with size 5K
split -b 1K /mnt/sdcard/image.png /mnt/sdcard/image_
return
image_aa (1K)
image_ab (1K)
image_ac (1K)
image_ad (1K)
image_ae (1K)
https://www.linuxtechi.com/split-command-examples-for-linux-unix/
39.- stat
stat, displaying detailed information relating to a file.
stat /mnt/sdcard/imagen.jpg
40.- tar
tar, packages files, it can compress and decompress it.
tar -cf /mnt/sdcard/my_files.tar /mnt/sdcard
tar -czf /mnt/sdcard/archivos.tar.gz /mnt/sdcard (compress)
tar -cjf /mnt/sdcard/archivos.tar.bz2 /mnt/sdcard (compress)
untar
tar -xf /mnt/sdcard/archivos.tar -C /mnt/sdcard/bk_dir/
tar -xzf /mnt/sdcard/archivos.tar.gz -C /mnt/sdcard/bk_dir/
41.- tee ::: touch
tee, reads the standard input and writes it to both the standard output and one or more files.
ls -ali /mnt/sdcard/ | tee /mnt/sdcard/my_list.txt | cat
touch, change file timestamps or create empty file.
touch /mnt/sdcard/zero.txt
touch -am 2019-12-12T12:12:12 /mnt/sdcard/my_file.txt (user root)
stat /mnt/sdcard/my_file.txt
42.- toybox
toybox is a file that contains most of these LINUX commands.
For example, truncate is a symbolic link to the toybox file, such that when we run truncate we are executing a command that is “inside” toybox.
Using ls -ali /system/bin/ we get this list …
Toybox’s main goal is to make Android self-hosting by improving Android’s command line utilities so it can build an installable Android Open Source Project image entirely from source under a stock Android system. After a talk at the 2013 Embedded Linux Conference explaining this plan (outline, video), Google merged toybox into AOSP and began shipping toybox in Android Mashmallow. (http://www.landley.net/toybox/about.html)
Help commands toybox: http://www.landley.net/toybox/help.html
oooooooooooooooOOOOOOOOOOOOOOOOooooooooooo
toolbox is similar to toybox, https://elinux.org/Android_toolbox
43.- truncate
truncate, used to shrink or extend the size of file.
touch /mnt/sdcard/zero.txt ( 0 bytes)
ls -ali /mnt/sdcard/zero.txt
truncate -s 123K /mnt/sdcard/zero.txt (now 123K)(filled NULNUL)
ls -ali /mnt/sdcard/zero.txt
44.- uptime
uptime, how long your system has been running.
46.- wc
wc, count lines, words and characters.
wc /mnt/sdcard/my_file.txt
wc -l /mnt/sdcard/my_file.txt
wc -w /mnt/sdcard/my_file.txt
wc -c /mnt/sdcard/my_file.txt
wc -m /mnt/sdcard/my_file.txt
47.- zcat ::: zip_utils
zcat, like gzip -dc
zip_utils, tool zip.
48.- sh
sh, run script.
Simple example of script:
mkdir /mnt/sdcard/my_directory
DIRE="/mnt/sdcard/my_directory"
date > $DIRE/date.txt
echo “Hello friend” > $DIRE/friend.txt
ping -c 3 google.com > $DIRE/my_ping.txt &
find /mnt/sdcard/ -name *.jpg > $DIRE/my_list_jpg.txt &
echo "Characters in file friend.txt: " > $DIRE/size_file.txt
wc -c $DIRE/friend.txt >> $DIRE/size_file.txt
This script creates the directory: my_directory in SdCard and various files within it.
We can run it from the MITCOMPANION or Compiled.
Compiled: the block AssetsToCacheDir copies the file my_script.txt
from the assets to the cache directory of the same application, that is: /data/user/0/appinventor.ai_juan.shell_script/cachemy_script.txt
shell_script.aia (10.3 KB)
49.- awk
awk is a scripting language which is used for processing or analyzing text files .
We are going to do the examples in this tutorial:
https://www.linuxtechi.com/awk-command-tutorial-with-examples/
shell_awk.aia (12.1 KB)
If you have sqlite3 in your /system/bin, you can run sqlite commands. Here are a couple of examples:
sqlite3 -header -csv /storage/emulated/0/< path/to/database > 'SELECT * FROM < table or view >;'
(remove "-header" if you do not want the column headings, replace items in and including <> for your database and table or view)
sqlite3 -header -csv /storage/emulated/0/< path/to/database > 'SELECT * from < table or view >;' > /storage/emulated/0/< path/to/filename >.csv
(this method is not provided by the various sqlite extensions, so a shortcut to extracting data)
I tried doing this with bash scripts but they just didn't want to work for some reason
Good One
How can I connect to a Redis server?
Will you please give me a sample string to connect and get the value?
You would need to have redis-tools installed on the device to even try to connect to a redis server using redis-cli and this extension. You cannot, as far as I know, install redis-tools....
How can I Install it? Any link or idea?
Sir, I already have a Redis server installed and it contains 7 ports. I have used the Cloud DB components and created all my apps. I want t to use the HSET, HGET commands of Redis as we don’t have in the Cloud DB component. So, I thought some how we have an option to release commands with this extension.
As I said....
You might be able to do something with php, sending commands to a server, and then use shell_exec to send redis commnds?
