Command Detail - F

find

The bash find command has loads of functionality - I could possibly devote many pages to Powershell equivalents of the various options, but at it's simplest the bash find does this:

find . -name '*BB.txt'

./Archive/Script_WO7171BB.txt

./Archive/Script_WO8541BB.txt

./Archive/Script_WO8645_BB.txt

./Archive/WO8559B/Script_WO8559_Master_ScriptBB.txt

./Archive/WO8559B/WO8559_finalBB.txt

./Archive/WO8559B/WO8559_part1BB.txt

./Archive/WO8559B/WO8559_part2BB.txt

The simplest Powershell equivalent of the bash find is simply to stick a -recurse on the end of a dir command

PS x:\> dir  *BB.txt -recurse

    Directory: x:\Archive\WO8559B

Mode                LastWriteTime     Length Name
----                -------------     ------ ----
-----        28/02/2012     17:15        608 Script_WO8559_Master_ScriptBB.txt
-----        28/02/2012     17:17         44 WO8559_finalBB.txt
-----        28/02/2012     17:17      14567 WO8559_part1BB.txt
-----        28/02/2012     17:15       1961 WO8559_part2BB.txt

    Directory: x:\Archive

Mode                LastWriteTime     Length Name
----                -------------     ------ ----
-----        15/06/2011     08:56       2972 Script_WO7171BB.txt
-----        14/02/2012     16:39       3662 Script_WO8541BB.txt
-----        27/02/2012     15:22       3839 Script_WO8645_BB.txt

If you want Powersehll to give you output that looks more like the Unix find then you can pipe into | select fullname

PS x:\> dir  *BB.txt -recurse | select fullname

FullName
--------
x:\Archive\WO8559B\Script_WO8559_Master_ScriptBB.txt
x:\Archive\WO8559B\WO8559_finalBB.txt
x:\Archive\WO8559B\WO8559_part1BB.txt
x:\Archive\WO8559B\WO8559_part2BB.txt
x:\Archive\Script_WO7171BB.txt
x:\Archive\Script_WO8541BB.txt
x:\Archive\Script_WO8645_BB.txt

for

for loop - start, stop, step

The equivalent of this bash:

for (( i = 1 ; i <= 5 ; i++ ))
do   
  echo "Hello, world $i"
done

Hello, world 1
Hello, world 2
Hello, world 3
Hello, world 4
Hello, world 5

...is

for ($i = 1; $i -le 5; $i++)
{
  write-output "Hello, world $i"
}

Hello, world 1
Hello, world 2
Hello, world 3
Hello, world 4
Hello, world 5

for loop - foreach item in a list

For the Bash

for I in Chelsea Arsenal Spuds
do
  echo $I
done

the equivalent Powershell is:

foreach ($Team in ("Chelsea", "Arsenal", "Spuds")) {write-output $Team}

for loop - for each word in a string

For the bash:

london="Chelsea Arsenal Spurs"
for team in $london; do   echo "$team"; done

...the equivalent Powershell is:

$London = "Chelsea Arsenal Spuds"
foreach ($Team in ($London.split())) {write-output $Team}

for loops - for lines in a file

Bash:

for team in $(egrep -v mill london.txt)
> do
>   echo $team
> done

Posh:

select-string -notmatch millwall london.txt | select line | foreach {write-output $_}

or:

foreach ($team in (select-string -notmatch millwall london.txt | select line)) {$team}

for loop - for each file in a folder

Bash:

for LocalFile in *
do   
  echo $LocalFile
done

Posh:

foreach ($LocalFile in $(gci)) {write-output $LocalFile.Name}