> (greater-than)
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The Unix redirection operator “>” can be used to redirect the output of a command to a file. Simply add “>” at the end of the command, followed by the name of the file to which you wish to redirect the output. The file will be saved in your Unix working directory.
Examples
Redirect the output of an efetch command to a file named “abstract.txt”:
efetch -db pubmed -id 26287646 -format abstract > abstract.txt
Redirect the output of an esearch command to a file named “search_results.xml”:
esearch -db pubmed -query "h1n1 asthma" > search_results.xml