Progra ~ 1 meaning, grep-V grep

C: // progra ~ 1 // tugzip // tugzip.exe ???? Representative: C: // program files // tugzip // tugzip.exe

Answer:
This is a normal phenomenon. It is due to the habit of the DOS operating system. In general, the file name in DOS is 8 characters long and 3 extension characters long.
If the number is less than or equal to 8, the full name is displayed. However, if the number of file names is greater than 8 characters, only the first 6 are displayed, followed by a "~" Symbol,
The number "1" indicates that the letter "M" is omitted. Of course, there are actually more than "Files ",
It is not recognized because it is separated by spaces.

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Grep-V grep,-V: All lines but those matching are printed

Grep without grep
Example: Check if a process is not in
PS-Ef | grep httpd
Result:
Nobody 14528 571 0 July 29/usr/local/Apache/bin/httpd
CMCS 17100 16884 0 22:06:10 pts/0 grep httpd

If PS-Ef | grep httpd | grep-V grep
Result:
Nobody 14528 571 0 July 29/usr/local/Apache/bin/httpd