diff --git a/tldr/bc b/tldr/bc
index 91fab357..83d3662b 100644
--- a/tldr/bc
+++ b/tldr/bc
@@ -6,16 +6,16 @@ source: https://github.com/tldr-pages/tldr.git
 # bc
 
 > An arbitrary precision calculator language.
-> See also: `dc`.
+> See also: `dc`, `qalc`.
 > More information: <https://manned.org/bc.1>.
 
 - Start an interactive session:
 
 `bc`
 
-- Start an interactive session with the standard math library enabled:
+- Start an [i]nteractive session with the standard math [l]ibrary enabled:
 
-`bc --mathlib`
+`bc --interactive --mathlib`
 
 - Calculate an expression:
 
@@ -32,3 +32,7 @@ source: https://github.com/tldr-pages/tldr.git
 - Calculate a sine/cosine/arctangent/natural logarithm/exponential function using `mathlib`:
 
 `echo '{{s|c|a|l|e}}({{1}})' | bc --mathlib`
+
+- Execute an inline factorial script:
+
+`echo "define factorial(n) { if (n <= 1) return 1; return n*factorial(n-1); }; factorial({{10}})" | bc`
diff --git a/tldr/dc b/tldr/dc
index f8d67492..30388d4c 100644
--- a/tldr/dc
+++ b/tldr/dc
@@ -6,7 +6,7 @@ source: https://github.com/tldr-pages/tldr.git
 # dc
 
 > An arbitrary precision calculator. Uses reverse polish notation (RPN).
-> See also: `bc`.
+> See also: `bc`, `qalc`.
 > More information: <https://www.gnu.org/software/bc/manual/dc-1.05/html_mono/dc.html>.
 
 - Start an interactive session:
diff --git a/tldr/linux/filefrag b/tldr/linux/filefrag
index c66752d7..ca2a0760 100644
--- a/tldr/linux/filefrag
+++ b/tldr/linux/filefrag
@@ -14,7 +14,11 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Display a report using a 1024 byte blocksize:
 
-`filefrag -b {{path/to/file}}`
+`filefrag -k {{path/to/file}}`
+
+- Display a report using a certain blocksize:
+
+`filefrag -b{{1024|1K|1M|1G|...}} {{path/to/file}}`
 
 - Sync the file before requesting the mapping: