ファイルをフィルタリングしてすべてのパスを一覧表示します。

テキストファイルをフィルタリングしてすべてのコンテンツを削除し、その中のパスのみを維持するにはどうすればよいですか？たとえば、

dslkjcblasdjncklasdnlc /asdds/ads/adss/sdf.jpg asljdascuashn sdkm
/sdf/dsf/dsf/dfs/sdfs.txt ,nbaskhdnasm.ddslkjcblasdjncklasdnlc
/asdds/ads/adss/sdf.jpg asljdascuashn sdkm /sdf/dsf/dsf/dfs/sdfs.txt
,nbaskhdnasm.ddslkjcblasdjncklasdnlc /asdds/ads/adss/sdf.jpg
 asljdascuashn sdkm /34/34/dsf/dfs/sdfs.txt
 ,nbaskhdnasm.ddslkjcblasdjncklasdnlc /asdds/ads/adss/sdf.jpg
 asljdascuashn sdkm /sdf/dsf/dsf/dfs/sdfs.txt
 ,nbaskhdnasm.ddslkjcblasdjncklasdnlc /sd/df/fg/fgsdf.jpg asljdascuashn
 sdkm /sdf/dsf/34/dfs/sdfs.txt ,nbaskhdnasm.ddslkjcblasdjncklasdnlc
 /asdds/ads/adss/sdf.jpg asljdascuashn sdkm /sdf/dsf/dsf/dfs/sdfs.txt
 ,nbaskhdnasm.ddslkjcblasdjncklasdnlc /qw2/sd23/adss/sdf.jpg
 asljdascuashn sdkm /34/34/dsf/dfs/sdfs.png
 ,nbaskhdnasm.ddslkjcblasdjncklasdnlc /asdds/ads/adss/sdf.jpg
 asljdascuashn sdkm /sdf/dsf/dsf/dfs/sdfs.txt
 ,nbaskhdnasm.ddslkjcblasdjncklasdnlc /wre/ads/adss/sdf.nii
 asljdascuashn sdkm /sdf/dsf34/dsf/dfs/sdfs.pmb
 ,nbaskhdnasm.ddslkjcblasdjncklasdnlc /asdds/ads/adss/sdf.jpg
 asljdascuashn sdkm /sdf/dsf/dsf/dfs/sdfs.txt
 ,nbaskhdnasm.ddslkjcblasdjncklasdnlc /34/ads/34/sdf.jpg asljdascuashn
 sdkm /34/dsf/dsf/34/sdfs.dbt ,nbaskhdnasm.ddslkjcblasdjncklasdnlc
 /asdds/ads/adss/sdf.jpg asljdascuashn sdkm /sdf/dsf/dsf/dfs/sdfs.txt
 ,nbaskhdnasm.ddslkjcblasdjncklasdnlc /34/34/34/sdf.zip asljdascuashn
 sdkm /sd34f/dsf/dsf/34/sdfs.tar.gz ,nbaskhdnasm.d

すべてを削除し、パスだけを維持して次のようにするにはどうすればよいですか？

/asdds/ads/adss/sdf.jpg 
/sdf/dsf/dsf/dfs/sdfs.txt 
/asdds/ads/adss/sdf.jpg 
/sdf/dsf/dsf/dfs/sdfs.txt 
/asdds/ads/adss/sdf.jpg 
/34/34/dsf/dfs/sdfs.txt 
/ads/adss/sdf.jpg 
/sdf/dsf/dsf/dfs/sdfs.txt 
/sd/df/fg/fgsdf.jpg 
/sdf/dsf/34/dfs/sdfs.txt 
/asdds/ads/adss/sdf.jpg 
/sdf/dsf/dsf/dfs/sdfs.txt 
/qw2/sd23/adss/sdf.jpg 
/34/34/dsf/dfs/sdfs.png
/asdds/ads/adss/sdf.jpg 
/sdf/dsf/dsf/dfs/sdfs.txt 
/wre/ads/adss/sdf.nii 
/sdf/dsf34/dsf/dfs/sdfs.pmb 
/asdds/ads/adss/sdf.jpg 
/sdf/dsf/dsf/dfs/sdfs.txt 
/34/ads/34/sdf.jpg
/34/dsf/dsf/34/sdfs.dbt
/asdds/ads/adss/sdf.jpg 
/sdf/dsf/dsf/dfs/sdfs.txt 
/34/34/34/sdf.zip 
/sd34f/dsf/dsf/34/sdfs.tar.gz