explain options introduced in examples

[barcat.git] / barcat

diff --git a/barcat b/barcat
index 9c4741a383efaafac4dc11423aaf0e885fde22a1..b6f60ef2a6b36355c1de63f3d6a96a935fe108ea 100755 (executable)
--- a/barcat
+++ b/barcat
@@ -315,15 +315,15 @@ Draw a sine wave:
 
     seq 30 | awk '{print sin($1/10)}' | barcat
 
-Compare file sizes:
+Compare file sizes (with human-readable numbers):
 
-    du -d0 -m * | barcat
+    du -d0 -b * | barcat -H
 
-Memory usage of user processes:
+Memory usage of user processes with long names truncated:
 
     ps xo %mem,pid,cmd | barcat -l40
 
-Monitor network latency:
+Monitor network latency from prefixed results:
 
     ping google.com | barcat -f'time=\K' -t
 
@@ -334,14 +334,14 @@ Commonly used after counting, for example users on the current server:
 Letter frequencies in text files:
 
     cat /usr/share/games/fortunes/*.u8 |
-    perl -CO -nE 'say for grep length, split /\PL*/, uc' |
+    perl -CS -nE 'say for grep length, split /\PL*/, uc' |
     sort | uniq -c | barcat
 
 Number of HTTP requests per day:
 
     cat log/access.log | cut -d\  -f4 | cut -d: -f1 | uniq -c | barcat
 
-Any kind of database query with leading counts:
+Any kind of database query with counts, preserving returned alignment:
 
     echo 'SELECT count(*),schemaname FROM pg_tables GROUP BY 2' |
     psql -t | barcat -u