Update cheatsheets

linux/esearch

@@ -0,0 +1,26 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# esearch
+
+> Perform a new Entrez search using terms in indexed fields.
+> It is part of the `edirect` package.
+> More information: <https://www.ncbi.nlm.nih.gov/books/NBK179288/>.
+
+- Search the pubmed database for selective serotonin reuptake inhibitor:
+
+`esearch -db pubmed -query "{{selective serotonin reuptake inhibitor}}"`
+
+- Search the protein database using a query and regexp:
+
+`esearch -db {{protein}} -query {{'Escherichia*'}}`
+
+- Search the nucleotide database for sequences whose metadata contain insulin and rodents:
+
+`esearch -db nuccore -query "{{insulin [PROT] AND rodents [ORGN]}}"`
+
+- Display [h]elp:
+
+`esearch -h`