add useful commands

1 files changed, 12 insertions, 0 deletions

diff --git a/bash.html.markdown b/bash.html.markdown
index ed93d58b..4d80545e 100644
--- a/bash.html.markdown
+++ b/bash.html.markdown
@@ -127,4 +127,16 @@ foo ()
 
 # Calling your function
 foo "My name is" $NAME
+
+# There are a lot of useful commands you should learn:
+tail -n 10 file.txt
+# prints last 10 lines of file.txt
+head -n 10 file.txt
+# prints first 10 lines of file.txt
+sort file.txt
+# sort file.txt's lines
+uniq -d file.txt
+# report or omit repeated lines, with -d it reports them
+cut -d ',' -f 1 file.txt
+# prints only the first column before the ',' character
 ```