Update cheatsheets

linux/einfo

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# einfo
+
+> Provides the number of records indexed in each database field, the last update date of the database, and the available links from the database to other Entrez databases.
+> More information: <https://www.ncbi.nlm.nih.gov/books/NBK179288/>.
+
+- Print all database names:
+
+`einfo -dbs`
+
+- Print all information of the protein database in XML format:
+
+`einfo -db {{protein}}`
+
+- Print all fields of the nuccore database:
+
+`einfo -db {{nuccore}} -fields`
+
+- Print all links of the protein database:
+
+`einfo -db {{protein}} -links`