Added new "touch" command (#18805)

Added new useful touch command used for modifying timestamps

client/src/pages/guide/english/bash/bash-touch/index.md

@@ -0,0 +1,26 @@
+---
+title: Bash touch
+---
+
+## Bash command: touch
+
+**Change timestamps of files.**
+
+```
+touch [options] filename
+```
+
+Creates empty file if not exists or modify times of existing files to current time.
+
+Commonly used options:
+- `-t` change timestamp to specific date ((YYYYMMDDHHMM.SS)) instead of current time.
+- `-r` use timestamp from first file to second file.
+
+Examples:
+```
+touch -t YYYYMMDDHHMM.SS filename
+touch -r file1 file2
+```
+
+### More Information:
+* [Man pages](http://man7.org/linux/man-pages/man1/touch.1.html)