commands detail - f
- find
- for

commands 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:

2. find . -name '*BB.txt'
3. ./Archive/Script_WO7171BB.txt
4. ./Archive/Script_WO8541BB.txt
5. ./Archive/Script_WO8645_BB.txt
6. ./Archive/WO8559B/Script_WO8559_Master_ScriptBB.txt
7. ./Archive/WO8559B/WO8559_finalBB.txt
8. ./Archive/WO8559B/WO8559_part1BB.txt
9. ./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

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

4. Directory: x:\Archive\WO8559B

6. Mode                LastWriteTime     Length Name
7. ----                -------------     ------ ----
8. -----        28/02/2012     17:15        608 Script_WO8559_Master_ScriptBB.txt
9. -----        28/02/2012     17:17         44 WO8559_finalBB.txt
10. -----        28/02/2012     17:17      14567 WO8559_part1BB.txt
11. -----        28/02/2012     17:15       1961 WO8559_part2BB.txt

13. Directory: x:\Archive

15. Mode                LastWriteTime     Length Name
16. ----                -------------     ------ ----
17. -----        15/06/2011     08:56       2972 Script_WO7171BB.txt
18. -----        14/02/2012     16:39       3662 Script_WO8541BB.txt
19. -----        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

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

3. FullName
4. --------
5. x:\Archive\WO8559B\Script_WO8559_Master_ScriptBB.txt
6. x:\Archive\WO8559B\WO8559_finalBB.txt
7. x:\Archive\WO8559B\WO8559_part1BB.txt
8. x:\Archive\WO8559B\WO8559_part2BB.txt
9. x:\Archive\Script_WO7171BB.txt
10. x:\Archive\Script_WO8541BB.txt
11. x:\Archive\Script_WO8645_BB.txt

for

for loop - start, stop, step

The equivalent of this bash:

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

6. Hello, world 1
7. Hello, world 2
8. Hello, world 3
9. Hello, world 4
10. Hello, world 5

…is

1. for ($i = 1; $i -le 5; $i++)
2. {
3. write-output "Hello, world $i"
4. }

6. Hello, world 1
7. Hello, world 2
8. Hello, world 3
9. Hello, world 4
10. Hello, world 5

for loop - foreach item in a list

For the Bash

1. for I in Chelsea Arsenal Spuds
2. do
3. echo $I
4. done

the equivalent Powershell is:

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

for loop - for each word in a string

For the bash:

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

…the equivalent Powershell is:

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

for loops - for lines in a file

Bash:

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

Posh:

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

or:

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

for loop - for each file in a folder