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+# GNU Parallel
+
+> Run commands on multiple CPU cores
+
+- gzip several files at once, using all cores
+
+`parallel gzip ::: {{file1}} {{file2}} {{file3}}`
+
+- read arguments from stdin, run 4 jobs at once
+
+`ls *.txt | parallel -j4 gzip`
+
+- Convert JPG images to PNG using replacement strings
+
+`parallel convert {} {.}.png ::: *.jpg`
+
+- parallel xargs, cram as many args as possible onto one command
+
+`{{args}} | parallel -X {{command}}`
+
+- break stdin into ~1M blocks, feed each block to stdin of new command
+
+`cat {{bigfile.txt}} | parallel --pipe --block 1M {{command}}`
+
+- run on multiple machines via SSH
+
+`parallel -S {{machine1}},{{machine2}} {{command}} ::: {{arg1}} {{arg2}}`