grep: initial notes

2 files changed, 22 insertions, 1 deletions

diff --git a/src/cli/README.md b/src/cli/README.md
index 8144745..6b7a661 100644
--- a/src/cli/README.md
+++ b/src/cli/README.md
@@ -9,4 +9,5 @@
 - [tac](./tac.md)
 - [rev](./rev.md)
 - [paste](./paste.md)
-- [xargs](./xargs.md)
\ No newline at end of file
+- [xargs](./xargs.md)
+- [grep](./grep.md)
diff --git a/src/cli/grep.md b/src/cli/grep.md
new file mode 100644
index 0000000..a2001b9
--- /dev/null
+++ b/src/cli/grep.md
@@ -0,0 +1,20 @@
+# grep(1)
+
+```
+sort [opts] [pattern] [files]
+    -e <pattern>        pattern to search for (can be supplied multiple times)
+    -i                  ignore case in patterns
+    -v                  invert match
+
+    -n                  add line numbers to matched lines
+    -H                  add file name to matched lines
+
+    -r                  recursively read all files
+    -I                  skip binary files
+    --include <glob>    search only files matching glob
+    --exclude <glob>    skip searching files matching glob
+
+    -c                  count occurrence of matched patterns
+    -l                  list only file name which contain the pattern
+```
+> `<glob>` patterns may need to be quoted or escaped if the shell also does glob expansion.