diff --git a/accessed-files b/accessed-files
index a89639b..695d116 100755
--- a/accessed-files
+++ b/accessed-files
@@ -139,7 +139,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    accessed-files [optoins]
+    accessed-files [options]
 
 Options:
     -a <args>           Pass extra arguments to the stap utility.
diff --git a/ngx-backtrace b/ngx-backtrace
index 8c777f8..1590f88 100755
--- a/ngx-backtrace
+++ b/ngx-backtrace
@@ -42,7 +42,7 @@ exec 'addr2line', '-e', $exec_file, '-f', @ARGV;
 sub usage {
     return <<'_EOC_';
 Usage:
-    ngx-backtrace [optoins]
+    ngx-backtrace [options]
 
 Options:
     -h                  Print this usage.
diff --git a/ngx-body-filters b/ngx-body-filters
index 5476f57..ed69c9e 100755
--- a/ngx-body-filters
+++ b/ngx-body-filters
@@ -139,7 +139,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    ngx-body-filters [optoins]
+    ngx-body-filters [options]
 
 Options:
     -a <args>           Pass extra arguments to the stap utility.
diff --git a/ngx-chain-bufs b/ngx-chain-bufs
index 35d1bcf..e91316f 100755
--- a/ngx-chain-bufs
+++ b/ngx-chain-bufs
@@ -161,7 +161,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    ngx-chain-bufs [optoins] <chain-link-pointer>
+    ngx-chain-bufs [options] <chain-link-pointer>
 
 Options:
     -a <args>           Pass extra arguments to the stap utility.
diff --git a/ngx-cycle-pool b/ngx-cycle-pool
index 84a0ff8..3e49c03 100755
--- a/ngx-cycle-pool
+++ b/ngx-cycle-pool
@@ -173,7 +173,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    ngx-cycle-pool [optoins]
+    ngx-cycle-pool [options]
 
 Options:
     -a <args>           Pass extra arguments to the stap utility.
diff --git a/ngx-header-filters b/ngx-header-filters
index cee9328..75eeb5d 100755
--- a/ngx-header-filters
+++ b/ngx-header-filters
@@ -134,7 +134,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    ngx-header-filters [optoins]
+    ngx-header-filters [options]
 
 Options:
     -a <args>           Pass extra arguments to the stap utility.
diff --git a/ngx-leaked-pools b/ngx-leaked-pools
index ec39086..264bb2f 100755
--- a/ngx-leaked-pools
+++ b/ngx-leaked-pools
@@ -138,7 +138,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    ngx-leaked-pools [optoins]
+    ngx-leaked-pools [options]
 
 Options:
     -a <args>           Pass extra arguments to the stap utility.
diff --git a/ngx-lua-bt b/ngx-lua-bt
index a7653fd..8597888 100755
--- a/ngx-lua-bt
+++ b/ngx-lua-bt
@@ -858,7 +858,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    ngx-lua-bt [optoins]
+    ngx-lua-bt [options]
 
 Options:
     -a <args>           Pass extra arguments to the stap utility.
diff --git a/ngx-lua-conn-pools b/ngx-lua-conn-pools
index eab78e6..0208016 100755
--- a/ngx-lua-conn-pools
+++ b/ngx-lua-conn-pools
@@ -461,7 +461,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    ngx-lua-conn-pools [optoins]
+    ngx-lua-conn-pools [options]
 
 Options:
     -p <pid>            Specify the nginx worker process pid.
diff --git a/ngx-lua-shdict b/ngx-lua-shdict
index cf5d618..c9b39fc 100755
--- a/ngx-lua-shdict
+++ b/ngx-lua-shdict
@@ -400,7 +400,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    ngx-lua-shdict [optoins]
+    ngx-lua-shdict [options]
 
 Options:
     -p <pid>            Specify the nginx worker process pid.
diff --git a/ngx-pcre-stats b/ngx-pcre-stats
index c748670..ef76ceb 100755
--- a/ngx-pcre-stats
+++ b/ngx-pcre-stats
@@ -398,7 +398,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    ngx-pcre-stats [optoins]
+    ngx-pcre-stats [options]
 
 Options:
     -a <args>           Pass extra arguments to the stap utility.
diff --git a/ngx-pcrejit b/ngx-pcrejit
index cf1c994..4a81c42 100755
--- a/ngx-pcrejit
+++ b/ngx-pcrejit
@@ -148,7 +148,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    ngx-pcrejit [optoins]
+    ngx-pcrejit [options]
 
 Options:
     -a <args>           Pass extra arguments to the stap utility.
diff --git a/ngx-phase-handlers b/ngx-phase-handlers
index db767d9..40893c0 100755
--- a/ngx-phase-handlers
+++ b/ngx-phase-handlers
@@ -204,7 +204,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    ngx-phase-handlers [optoins]
+    ngx-phase-handlers [options]
 
 Options:
     -a <args>           Pass extra arguments to the stap utility.
diff --git a/ngx-req-distr b/ngx-req-distr
index f7bd5e9..e1a717b 100755
--- a/ngx-req-distr
+++ b/ngx-req-distr
@@ -150,7 +150,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    ngx-req-distr [optoins]
+    ngx-req-distr [options]
 
 Options:
     -a <args>           Pass extra arguments to the stap utility.
diff --git a/ngx-sample-lua-bt b/ngx-sample-lua-bt
index f9f0040..67c59ef 100755
--- a/ngx-sample-lua-bt
+++ b/ngx-sample-lua-bt
@@ -780,7 +780,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    ngx-sample-lua-bt [optoins]
+    ngx-sample-lua-bt [options]
 
 Options:
     -a <args>           Pass extra arguments to the stap utility.
diff --git a/ngx-shm b/ngx-shm
index e6010f4..db3ea13 100755
--- a/ngx-shm
+++ b/ngx-shm
@@ -254,7 +254,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    ngx-shm [optoins]
+    ngx-shm [options]
 
 Options:
     -a <args>           Pass extra arguments to the stap utility.
diff --git a/sample-bt b/sample-bt
index 19fee28..4e00ffe 100755
--- a/sample-bt
+++ b/sample-bt
@@ -278,7 +278,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    sample-bt [optoins]
+    sample-bt [options]
 
 Options:
     -a <args>           Pass extra arguments to the stap utility.
diff --git a/sample-bt-off-cpu b/sample-bt-off-cpu
index c342f3f..d86c1a2 100755
--- a/sample-bt-off-cpu
+++ b/sample-bt-off-cpu
@@ -284,7 +284,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    sample-bt-off-cpu [optoins]
+    sample-bt-off-cpu [options]
 
 Options:
     -a <args>           Pass extra arguments to the stap utility.
diff --git a/sample-bt-vfs b/sample-bt-vfs
index d77b222..30c7f87 100755
--- a/sample-bt-vfs
+++ b/sample-bt-vfs
@@ -211,7 +211,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    sample-bt-vfs [optoins]
+    sample-bt-vfs [options]
 
 Options:
     -a <args>           Pass extra arguments to the stap utility.
diff --git a/tcp-accept-queue b/tcp-accept-queue
index ea40fa0..377cc35 100755
--- a/tcp-accept-queue
+++ b/tcp-accept-queue
@@ -264,7 +264,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    tcp-accept-queue [optoins]
+    tcp-accept-queue [options]
 
 Options:
     -a <args>           Pass extra arguments to the stap utility.
diff --git a/tcp-recv-queue b/tcp-recv-queue
index 3620c46..113331b 100755
--- a/tcp-recv-queue
+++ b/tcp-recv-queue
@@ -167,7 +167,7 @@ close $in;
 sub usage {
     return <<'_EOC_';
 Usage:
-    tcp-recv-queue [optoins]
+    tcp-recv-queue [options]
 
 Options:
     -a <args>           Pass extra arguments to the stap utility.