> For the complete documentation index, see [llms.txt](https://devops-collective-inc.gitbook.io/a-unix-person-s-guide-to-powershell/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://devops-collective-inc.gitbook.io/a-unix-person-s-guide-to-powershell/commands-detail-t.md).

# Command Detail - T

## tail

```
gc file.txt | select-object -last 10
```

`gc` is an alias for `get-command`

## tail -f

```
gc -tail 10 -wait c:\windows\windowsupdate.log
```

## tee

The Powershell equivalent of the unix `tee` is `tee-object`....which, by default is aliased to `tee`

So you can do this:

```
get-process | tee c:\temp\test_tee.txt
```

...to both get a list of processes on your screen and get that output saved into the file in c:\temp

## time

The Powershell equivalent of the bash shell 'time' is 'measure-command'.

So, in bash you would do this:

```
time egrep ORA- *log
```

....and get all the egrep output, then

```
real    0m4.649s
user    0m0.030s
sys     0m0.112s
```

In Powershell, you would do this

```
measure-command {select-string ORA- *.sql}
```

...and get...

```
Days              : 0
Hours             : 0
Minutes           : 0
Seconds           : 0
Milliseconds      : 105
Ticks             : 1057357
TotalDays         : 1.22379282407407E-06
TotalHours        : 2.93710277777778E-05
TotalMinutes      : 0.00176226166666667
TotalSeconds      : 0.1057357
TotalMilliseconds : 105.7357
```

...you don't get the 'user CPU' time and 'system CPU' time, but you do get the added bonus of seeing how long the command took rendered as a fraction of a day!

## touch - create an empty file

```
set-content -Path c:\temp\new_empty_file.dat -Value $null
```

I found the set-content command at [Super User](http://superuser.com/questions/502374/equivalent-of-linux-touch-to-create-an-empty-file-with-powershell), the contributor being [user techie007](http://superuser.com/users/23133/techie007)

## touch - update the modified date

```
set-itemproperty -path c:\temp\new_empty_file.dat -name LastWriteTime -value $(get-date)
```

I got this from a comment by [Manung Han](https://twitter.com/manung) on the [Lab49 Blog](http://blog.lab49.com/archives/249#comment-1076). Doug Finke shares [touch function](http://blog.lab49.com/archives/249) in a later comment on the same post that fully implements the linux command.


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