diff --git a/NEWS b/NEWS
index b506a82ca..ab5242be9 100644
--- a/NEWS
+++ b/NEWS
@@ -401,7 +401,7 @@ What's new in Sudo 1.8.25
    while the system is sleeping is used where available.
 
  * Fixed a bug introduced in sudo 1.8.24 where sudoNotAfter in the LDAP
-   backend was not being properly parsed.  Bug #845.
+   back-end was not being properly parsed.  Bug #845.
 
  * When sudo runs a command in a pseudo-tty, the slave device is
    now closed in the main process immediately after starting the
@@ -423,12 +423,12 @@ What's new in Sudo 1.8.25
    LOGNAME on AIX systems.  Bug #848.
 
  * Fixed a regression introduced in sudo 1.8.24 where the LDAP and
-   SSSD backends evaluated the rules in reverse sudoOrder.  Bug #849.
+   SSSD back-ends evaluated the rules in reverse sudoOrder.  Bug #849.
 
 What's new in Sudo 1.8.24
 
  * The LDAP and SSS back-ends now use the same rule evaluation code
-   as the sudoers file backend.  This builds on the work in sudo
+   as the sudoers file back-end.  This builds on the work in sudo
    1.8.23 where the formatting functions for "sudo -l" output were
    shared.  The handling of negated commands in SSS and LDAP is
    unchanged.
@@ -498,7 +498,7 @@ What's new in Sudo 1.8.23
    It is also possible to filter the generated output file by user,
    group or host name.
 
- * The file, ldap and sss sudoers backends now share a common set
+ * The file, ldap and sss sudoers back-ends now share a common set
    of formatting functions for "sudo -l" output, which is also used
    by the cvtsudoers utility.
 
@@ -592,7 +592,7 @@ What's new in Sudo 1.8.22
  * A new "authfail_message" sudoers option that overrides the
    default "N incorrect password attempt(s)".
 
- * An empty sudoRunAsUser attribute in the LDAP and SSSD backends
+ * An empty sudoRunAsUser attribute in the LDAP and SSSD back-ends
    will now match the invoking user.  This is more consistent with
    how an empty runas user in the sudoers file is treated.
 
@@ -670,7 +670,7 @@ What's new in Sudo 1.8.21
    environment when the "env_reset" sudoers setting is disabled by
    removing the "*=()*" pattern from the env_delete list.
 
- * A change made in sudo 1.8.15 inadvertantly caused sudoedit to
+ * A change made in sudo 1.8.15 inadvertently caused sudoedit to
    send itself SIGHUP instead of exiting when the editor returns
    an error or the file was not modified.
 
@@ -921,7 +921,7 @@ What's new in Sudo 1.8.18
  * The sudoers locale is now set before parsing the sudoers file.
    If sudoers_locale is set in sudoers, it is applied before
    evaluating other Defaults entries.  Previously, sudoers_locale
-   was used when evaluating sudoers but not during the inital parse.
+   was used when evaluating sudoers but not during the initial parse.
    Bug #748.
 
  * A missing or otherwise invalid #includedir is now ignored instead
@@ -1019,7 +1019,7 @@ What's new in Sudo 1.8.17
    file entries were missing the newline when loglinelen is set to
    a non-positive number.  Bug #742.
 
- * Unix groups are now set before the plugin session intialization
+ * Unix groups are now set before the plugin session initialization
    code is run.  This makes it possible to use dynamic groups with
    the Linux-PAM pam_group module.
 
@@ -1351,7 +1351,7 @@ What's new in Sudo 1.8.13
 
  * The editor invoked by sudoedit once again uses an unmodified
    copy of the user's environment as per the documentation.  This
-   was inadvertantly changed in sudo 1.8.0.  Bug #688.
+   was inadvertently changed in sudo 1.8.0.  Bug #688.
 
 What's new in Sudo 1.8.12
 
@@ -2099,7 +2099,7 @@ What's new in Sudo 1.8.5?
    when PAM is used.  Sudo now merges the PAM environment into the
    user's environment which is typically set by the pam_env module.
 
- * The initial evironment created when env_reset is in effect now
+ * The initial environment created when env_reset is in effect now
    includes the contents of /etc/environment on AIX systems and the
    "setenv" and "path" entries from /etc/login.conf on BSD systems.
 
diff --git a/TODO b/TODO
index d314f086a..df48b2690 100644
--- a/TODO
+++ b/TODO
@@ -19,7 +19,7 @@ TODO list (most will be addressed in sudo 2.0)
 07) Should be able to mix Cmnd_Alias's and command args.  Ie:
 	pete   ALL=PASSWD [A-z]*,!PASSWD root
     where PASSWD was defined to be /usr/bin/passwd.
-    This requires the arg parsing to happen in the yacc grammer.
+    This requires the arg parsing to happen in the yacc grammar.
     At the very least, commands and args have to become separate
     tokens in the lexer.
 
@@ -64,7 +64,7 @@ TODO list (most will be addressed in sudo 2.0)
     http://publibn.boulder.ibm.com/doc_link/en_US/a_doc_lib/libs/basetrf2/setpenv.htm
     http://publib16.boulder.ibm.com/pseries/en_US/libs/basetrf2/setpcred.htm
 
-22) Add an insult_path variable that is intialized to "builtin" but that
+22) Add an insult_path variable that is initialized to "builtin" but that
     can point to other files containing an insult count as the first
     line and that have a constant record length (sparse files) for
     easy seeking.
diff --git a/config.h.in b/config.h.in
index 090f9b3c3..8567a323d 100644
--- a/config.h.in
+++ b/config.h.in
@@ -1035,7 +1035,7 @@
 /* Define to 1 if you don't want to use sudo's PAM session support. */
 #undef NO_PAM_SESSION
 
-/* Define to avoid runing the mailer as root. */
+/* Define to avoid running the mailer as root. */
 #undef NO_ROOT_MAILER
 
 /* Define to 1 if root should not be allowed to use sudo. */
diff --git a/configure.ac b/configure.ac
index 008f7b5cc..947c4b6a2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4763,7 +4763,7 @@ AH_TEMPLATE(NO_AUTHENTICATION, [Define to 1 if you don't want sudo to prompt for
 AH_TEMPLATE(NO_LEAKS, [Define to 1 if you want sudo to free up memory before exiting.])
 AH_TEMPLATE(NO_LECTURE, [Define to 1 if you don't want users to get the lecture the first they user sudo.])
 AH_TEMPLATE(NO_PAM_SESSION, [Define to 1 if you don't want to use sudo's PAM session support.])
-AH_TEMPLATE(NO_ROOT_MAILER, [Define to avoid runing the mailer as root.])
+AH_TEMPLATE(NO_ROOT_MAILER, [Define to avoid running the mailer as root.])
 AH_TEMPLATE(NO_ROOT_SUDO, [Define to 1 if root should not be allowed to use sudo.])
 AH_TEMPLATE(TIMESTAMP_TYPE, [Define to global, ppid or tty to set the default timestamp record type.])
 AH_TEMPLATE(OFFENSIVE_INSULTS, [Define to 1 to include offensive insults from the classic version of sudo.])
diff --git a/doc/sudo_plugin_python.man.in b/doc/sudo_plugin_python.man.in
index b1c7710b0..4c2303afa 100644
--- a/doc/sudo_plugin_python.man.in
+++ b/doc/sudo_plugin_python.man.in
@@ -1474,7 +1474,7 @@ sudo.conv(message(s), on_suspend=suspend_function,
 .PP
 The function arguments are as follows:
 .TP 6n
-\fImesssage(s)\fR
+\fImessage(s)\fR
 One of more messages (of type
 \fBsudo.ConvMessage\fR),
 each describing a conversation.
@@ -1643,7 +1643,7 @@ The function arguments are as follows:
 .br
 an integer, use one of the log level constants below
 .TP 6n
-\fImesssage(s)\fR
+\fImessage(s)\fR
 one or more messages to log
 .PP
 \fIAvailable log levels:\fR
@@ -1652,7 +1652,7 @@ l l l.
 .PP
 \fBsudo.conf name\fR	\fBPython constant\fR	\fBdescription\fR
 .PP
-crit	sudo.DEBUG.CRIT	only cricital messages
+crit	sudo.DEBUG.CRIT	only critical messages
 .PP
 err	sudo.DEBUG.ERROR	
 .PP
diff --git a/doc/sudo_plugin_python.mdoc.in b/doc/sudo_plugin_python.mdoc.in
index 419b50b8b..5bd27c390 100644
--- a/doc/sudo_plugin_python.mdoc.in
+++ b/doc/sudo_plugin_python.mdoc.in
@@ -1169,7 +1169,7 @@ sudo.conv(message(s), on_suspend=suspend_function,
 .Pp
 The function arguments are as follows:
 .Bl -tag -width 4n
-.It Fa messsage(s)
+.It Fa message(s)
 One of more messages (of type
 .Sy sudo.ConvMessage ) ,
 each describing a conversation.
@@ -1316,14 +1316,14 @@ The function arguments are as follows:
 .Bl -tag -width 4n
 .It Fa level
 an integer, use one of the log level constants below
-.It Fa messsage(s)
+.It Fa message(s)
 one or more messages to log
 .El
 .Pp
 .Em Available log levels:
-.Bl -column "name in sudo.conf" "Python constant" "only cricital messages"
+.Bl -column "name in sudo.conf" "Python constant" "only critical messages"
 .It Sy sudo.conf name Ta Sy Python constant Ta Sy description
-.It crit Ta sudo.DEBUG.CRIT Ta only cricital messages
+.It crit Ta sudo.DEBUG.CRIT Ta only critical messages
 .It err Ta sudo.DEBUG.ERROR Ta
 .It warn Ta sudo.DEBUG.WARN Ta
 .It notice Ta sudo.DEBUG.NOTICE Ta
diff --git a/etc/sudo.pp b/etc/sudo.pp
index 3359a525d..f9750e95e 100644
--- a/etc/sudo.pp
+++ b/etc/sudo.pp
@@ -331,7 +331,7 @@ still allow people to get their work done."
 	libc6, libpam0g, libpam-modules, zlib1g, libselinux1, libssl1.1
 
 %fixup [deb]
-	# Add Conflicts, Replaces headers and add libldap depedency as needed.
+	# Add Conflicts, Replaces headers and add libldap dependency as needed.
 	DEPENDS="%{linux_audit}"
 	if test -z "%{flavor}"; then
 	    echo "Conflicts: sudo-ldap" >> %{pp_wrkdir}/%{name}/DEBIAN/control
diff --git a/include/compat/getaddrinfo.h b/include/compat/getaddrinfo.h
index 6f2f203eb..9b36eaecd 100644
--- a/include/compat/getaddrinfo.h
+++ b/include/compat/getaddrinfo.h
@@ -3,7 +3,7 @@
  *
  * This is an implementation of the getaddrinfo family of functions for
  * systems that lack it, so that code can use getaddrinfo always.  It provides
- * IPv4 support only; for IPv6 support, a native getaddrinfo implemenation is
+ * IPv4 support only; for IPv6 support, a native getaddrinfo implementation is
  * required.
  *
  * The canonical version of this file is maintained in the rra-c-util package,
diff --git a/include/sudo_event.h b/include/sudo_event.h
index 61ada67ce..a3fd8f929 100644
--- a/include/sudo_event.h
+++ b/include/sudo_event.h
@@ -95,7 +95,7 @@ struct sudo_event_base {
     sig_atomic_t signal_pending[NSIG]; /* pending signals */
     sig_atomic_t signal_caught;	/* at least one signal caught */
     int num_handlers;		/* number of installed handlers */
-    int signal_pipe[2];		/* so we can wake up on singal */
+    int signal_pipe[2];		/* so we can wake up on signal */
 #if defined(HAVE_POLL) || defined(HAVE_PPOLL)
     struct pollfd *pfds;	/* array of struct pollfd */
     int pfd_max;		/* size of the pfds array */
diff --git a/include/sudo_util.h b/include/sudo_util.h
index 25060c36a..bf33cec61 100644
--- a/include/sudo_util.h
+++ b/include/sudo_util.h
@@ -161,7 +161,7 @@
 #define sudo_isclr(_a, _i)	(((_a)[(_i) / NBBY] & (1<<((_i) % NBBY))) == 0)
 
 /* sudo_parseln() flags */
-#define PARSELN_COMM_BOL	0x01	/* comments only at begining of line */
+#define PARSELN_COMM_BOL	0x01	/* comments only at beginning of line */
 #define PARSELN_CONT_IGN	0x02	/* ignore line continuation char */
 
 /*
diff --git a/lib/util/fnmatch.c b/lib/util/fnmatch.c
index 87731d002..d37123306 100644
--- a/lib/util/fnmatch.c
+++ b/lib/util/fnmatch.c
@@ -310,7 +310,7 @@ int sudo_fnmatch(const char *pattern, const char *string, int flags)
     const char *dummyptr;
     const char *matchptr;
     int wild;
-    /* For '*' wild processing only; surpress 'used before initialization'
+    /* For '*' wild processing only; suppress 'used before initialization'
      * warnings with dummy initialization values;
      */
     const char *strstartseg = NULL;
diff --git a/lib/util/getaddrinfo.c b/lib/util/getaddrinfo.c
index 5232649ab..99ff370c4 100644
--- a/lib/util/getaddrinfo.c
+++ b/lib/util/getaddrinfo.c
@@ -2,7 +2,7 @@
  * Replacement for a missing getaddrinfo.
  *
  * This is an implementation of getaddrinfo for systems that don't have one so
- * that networking code can use a consistant interface without #ifdef.  It is
+ * that networking code can use a consistent interface without #ifdef.  It is
  * a fairly minimal implementation, with the following limitations:
  *
  *   - IPv4 support only.  IPv6 is not supported.
diff --git a/lib/util/regress/vsyslog/vsyslog_test.c b/lib/util/regress/vsyslog/vsyslog_test.c
index 6c304181a..e3a7d5a8b 100644
--- a/lib/util/regress/vsyslog/vsyslog_test.c
+++ b/lib/util/regress/vsyslog/vsyslog_test.c
@@ -100,7 +100,7 @@ main(int argc, char *argv[])
     len = snprintf(buf1, sizeof(buf1),
 	 "unable to open %s: %s", "/var/log/sudo-io/seq", strerror(ENOENT));
     if (len < 0 || len >= ssizeof(buf1))
-	sudo_warnx_nodebug("buf1 trucated at %s:%d", __FILE__, __LINE__);
+	sudo_warnx_nodebug("buf1 truncated at %s:%d", __FILE__, __LINE__);
     expected_result = buf1;
     errno = ENOENT;
     test_vsyslog(0, "unable to open %s: %m", "/var/log/sudo-io/seq");
@@ -116,7 +116,7 @@ main(int argc, char *argv[])
     buf1[8184] = '\0';
     len = snprintf(buf2, sizeof(buf2), "%s: %s", buf1, strerror(EINVAL));
     if (len < 0 || len >= ssizeof(buf2))
-	sudo_warnx_nodebug("buf2 trucated at %s:%d", __FILE__, __LINE__);
+	sudo_warnx_nodebug("buf2 truncated at %s:%d", __FILE__, __LINE__);
     expected_result = buf2;
     errno = EINVAL;
     test_vsyslog(0, "%s: %m", buf1);
@@ -126,7 +126,7 @@ main(int argc, char *argv[])
     buf1[8184] = '\0';
     len = snprintf(buf2, sizeof(buf2), "%.*s", 2047, buf1);
     if (len < 0 || len >= ssizeof(buf2))
-	sudo_warnx_nodebug("buf2 trucated at %s:%d", __FILE__, __LINE__);
+	sudo_warnx_nodebug("buf2 truncated at %s:%d", __FILE__, __LINE__);
     expected_result = buf2;
     test_vsyslog(0, buf1);
 
diff --git a/logsrvd/logsrvd.c b/logsrvd/logsrvd.c
index 5e0e40cef..94d790179 100644
--- a/logsrvd/logsrvd.c
+++ b/logsrvd/logsrvd.c
@@ -1749,7 +1749,7 @@ write_pidfile(void)
 }
 
 /*
- * Fork, detatch from the terminal and write pid file unless nofork set.
+ * Fork, detach from the terminal and write pid file unless nofork set.
  */
 static void
 daemonize(bool nofork)
diff --git a/plugins/audit_json/audit_json.c b/plugins/audit_json/audit_json.c
index 95b939faf..1aaef8096 100644
--- a/plugins/audit_json/audit_json.c
+++ b/plugins/audit_json/audit_json.c
@@ -162,7 +162,7 @@ audit_json_open(unsigned int version, sudo_conv_t conversation,
     }
 
     /* open log file */
-    /* TODO: suport pipe */
+    /* TODO: support pipe */
     oldmask = umask(S_IRWXG|S_IRWXO);
     fd = open(state.logfile, O_RDWR|O_CREAT, S_IRUSR|S_IWUSR);
     (void)umask(oldmask);
diff --git a/plugins/python/example_debugging.py b/plugins/python/example_debugging.py
index a4aab38dd..01310c659 100644
--- a/plugins/python/example_debugging.py
+++ b/plugins/python/example_debugging.py
@@ -36,7 +36,7 @@ class DebugDemoPlugin(sudo.Plugin):
         load        logs python plugin loading / unloading
 
     Log levels
-        crit      sudo.DEBUG.CRIT       --> only cricital messages
+        crit      sudo.DEBUG.CRIT       --> only critical messages
         err       sudo.DEBUG.ERROR
         warn      sudo.DEBUG.WARN
         notice    sudo.DEBUG.NOTICE
diff --git a/plugins/python/regress/check_python_examples.c b/plugins/python/regress/check_python_examples.c
index 062c206fa..ad3559247 100644
--- a/plugins/python/regress/check_python_examples.c
+++ b/plugins/python/regress/check_python_examples.c
@@ -173,7 +173,7 @@ check_example_io_plugin_version_display(int is_verbose)
     python_io->close(0, 0);  // this should not call the python plugin close as there was no command run invocation
 
     if (is_verbose) {
-        // Note: the exact python version is environment dependant
+        // Note: the exact python version is environment dependent
         VERIFY_STR_CONTAINS(data.stdout_str, "Python interpreter version:");
         *strstr(data.stdout_str, "Python interpreter version:") = '\0';
         VERIFY_STDOUT(expected_path("check_example_io_plugin_version_display_full.stdout"));
@@ -707,7 +707,7 @@ check_example_policy_plugin_version_display(int is_verbose)
     python_policy->close(0, 0);  // this should not call the python plugin close as there was no command run invocation
 
     if (is_verbose) {
-        // Note: the exact python version is environment dependant
+        // Note: the exact python version is environment dependent
         VERIFY_STR_CONTAINS(data.stdout_str, "Python interpreter version:");
         *strstr(data.stdout_str, "Python interpreter version:") = '\0';
         VERIFY_STDOUT(expected_path("check_example_policy_plugin_version_display_full.stdout"));
diff --git a/plugins/python/regress/testhelpers.c b/plugins/python/regress/testhelpers.c
index b203a8f0b..5a1c02c9a 100644
--- a/plugins/python/regress/testhelpers.c
+++ b/plugins/python/regress/testhelpers.c
@@ -31,7 +31,7 @@ struct TestData data;
 static void
 clean_output(char *output)
 {
-    // we replace some output which otherwise would be test run dependant
+    // we replace some output which otherwise would be test run dependent
     str_replace_in_place(output, MAX_OUTPUT, data.tmp_dir, TEMP_PATH_TEMPLATE);
 
     if (data.tmp_dir2)
diff --git a/plugins/sudoers/gram.c b/plugins/sudoers/gram.c
index 996165748..9f17da2c9 100644
--- a/plugins/sudoers/gram.c
+++ b/plugins/sudoers/gram.c
@@ -113,7 +113,7 @@ struct sudoers_parse_tree parsed_policy = {
 };
 
 /*
- * Local protoypes
+ * Local prototypes
  */
 static void init_options(struct command_options *opts);
 static bool add_defaults(int, struct member *, struct defaults *);
diff --git a/plugins/sudoers/gram.y b/plugins/sudoers/gram.y
index eac4f54c3..aa857dd2b 100644
--- a/plugins/sudoers/gram.y
+++ b/plugins/sudoers/gram.y
@@ -70,7 +70,7 @@ struct sudoers_parse_tree parsed_policy = {
 };
 
 /*
- * Local protoypes
+ * Local prototypes
  */
 static void init_options(struct command_options *opts);
 static bool add_defaults(int, struct member *, struct defaults *);
diff --git a/plugins/sudoers/iolog.c b/plugins/sudoers/iolog.c
index 380d601c2..2ceadd225 100644
--- a/plugins/sudoers/iolog.c
+++ b/plugins/sudoers/iolog.c
@@ -640,7 +640,7 @@ sudoers_io_open_remote(struct timespec *now)
 	goto done;
     }
 
-    /* Read ServerHello syncronously or fail. */
+    /* Read ServerHello synchronously or fail. */
     if (read_server_hello(client_closure))
 	ret = 1;
 
diff --git a/plugins/sudoers/iolog_client.c b/plugins/sudoers/iolog_client.c
index 4c73a5f06..5012c3b23 100644
--- a/plugins/sudoers/iolog_client.c
+++ b/plugins/sudoers/iolog_client.c
@@ -528,7 +528,7 @@ connect_server(const char *host, const char *port, bool tls,
 /*
  * Connect to the first server in the list.
  * Stores socket in closure with O_NONBLOCK and close-on-exec flags set.
- * Retuns true on success, else false.
+ * Returns true on success, else false.
  */
 bool
 log_server_connect(struct client_closure *closure)
@@ -1158,7 +1158,7 @@ client_message_completion(struct client_closure *closure)
 
 /*
  * Read the ServerHello message from the log server.
- * We do this syncronously, since we don't want the command to run
+ * We do this synchronously, since we don't want the command to run
  * before the log server connection is completely established.
  */
 bool
@@ -1168,7 +1168,7 @@ read_server_hello(struct client_closure *closure)
     bool ret = false;
     debug_decl(read_server_hello, SUDOERS_DEBUG_UTIL);
 
-    /* Get new event base so we can read ServerHello syncronously. */
+    /* Get new event base so we can read ServerHello synchronously. */
     evbase = sudo_ev_base_alloc();
     if (evbase == NULL) {
 	sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
diff --git a/plugins/sudoers/parse.h b/plugins/sudoers/parse.h
index 706468bf7..ecc81b835 100644
--- a/plugins/sudoers/parse.h
+++ b/plugins/sudoers/parse.h
@@ -147,7 +147,7 @@ struct command_options {
  * the data structure used is a doubly-linked tail queue.  While sudoers
  * is being parsed, a headless tail queue is used where the first entry
  * acts as the head and the prev pointer does double duty as the tail pointer.
- * This makes it possible to trivally append sub-lists.  In addition, the prev
+ * This makes it possible to trivially append sub-lists.  In addition, the prev
  * pointer is always valid (even if it points to itself).  Unlike a circle
  * queue, the next pointer of the last entry is NULL and does not point back
  * to the head.  When the tail queue is finalized, it is converted to a
@@ -200,7 +200,7 @@ struct sudo_command {
 
 /*
  * Structure describing a linked list of Cmnd_Specs.
- * XXX - include struct command_options instad of its contents inline
+ * XXX - include struct command_options instead of its contents inline
  */
 struct cmndspec {
     TAILQ_ENTRY(cmndspec) entries;
diff --git a/plugins/sudoers/pwutil.h b/plugins/sudoers/pwutil.h
index e5d7f221b..d08f61f42 100644
--- a/plugins/sudoers/pwutil.h
+++ b/plugins/sudoers/pwutil.h
@@ -45,7 +45,7 @@ struct cache_item {
 
 /*
  * Container structs to simpify size and offset calculations and guarantee
- * proper aligment of struct passwd, group, gid_list and group_list.
+ * proper alignment of struct passwd, group, gid_list and group_list.
  */
 struct cache_item_pw {
     struct cache_item cache;
diff --git a/plugins/sudoers/regress/cvtsudoers/test30.sh b/plugins/sudoers/regress/cvtsudoers/test30.sh
index 20aa9ea5a..e280f5f53 100755
--- a/plugins/sudoers/regress/cvtsudoers/test30.sh
+++ b/plugins/sudoers/regress/cvtsudoers/test30.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# Test alias expasion when converting to JSON.
+# Test alias expansion when converting to JSON.
 # See https://bugzilla.sudo.ws/show_bug.cgi?id=853
 #
 
diff --git a/scripts/mkdep.pl b/scripts/mkdep.pl
index b87fc63c8..28e7ff05c 100755
--- a/scripts/mkdep.pl
+++ b/scripts/mkdep.pl
@@ -171,8 +171,8 @@ sub mkdep {
 	    # We have both .lo and .o files, only the .lo should be used
 	    warn "$file: $obj should be $1.lo\n";
 	} else {
-	    # Use old depenencies when mapping objects to their source.
-	    # If no old depenency, use the MANIFEST file to find the source.
+	    # Use old dependencies when mapping objects to their source.
+	    # If no old dependency, use the MANIFEST file to find the source.
 	    my $src = $1 . '.c';
 	    my $ext = $2;
 	    if (exists $old_deps{$obj}) {
diff --git a/src/exec.c b/src/exec.c
index a97c76049..e32048ba5 100644
--- a/src/exec.c
+++ b/src/exec.c
@@ -341,7 +341,7 @@ sudo_needs_pty(struct command_details *details)
 }
 
 /*
- * Execute a command, potentially in a pty with I/O loggging, and
+ * Execute a command, potentially in a pty with I/O logging, and
  * wait for it to finish.
  * This is a little bit tricky due to how POSIX job control works and
  * we fact that we have two different controlling terminals to deal with.
diff --git a/src/exec_monitor.c b/src/exec_monitor.c
index bdcd2b349..ffb840821 100644
--- a/src/exec_monitor.c
+++ b/src/exec_monitor.c
@@ -144,7 +144,7 @@ handle_winch(struct monitor_closure *mc, unsigned int wsize_packed)
     struct winsize wsize, owsize;
     debug_decl(handle_winch, SUDO_DEBUG_EXEC);
 
-    /* Rows and colums are stored as two shorts packed into a single int. */
+    /* Rows and columns are stored as two shorts packed into a single int. */
     wsize.ws_row = wsize_packed & 0xffff;
     wsize.ws_col = (wsize_packed >> 16) & 0xffff;
 
diff --git a/src/exec_pty.c b/src/exec_pty.c
index b8b378f3a..2a3da551b 100644
--- a/src/exec_pty.c
+++ b/src/exec_pty.c
@@ -650,7 +650,7 @@ read_callback(int fd, int what, void *v)
     switch (n) {
 	case -1:
 	    if (got_sigttin) {
-		/* Schedule SIGTTIN to be forwared to the command. */
+		/* Schedule SIGTTIN to be forwarded to the command. */
 		schedule_signal(iob->ec, SIGTTIN);
 	    }
 	    if (errno == EAGAIN || errno == EINTR)
@@ -755,7 +755,7 @@ write_callback(int fd, int what, void *v)
 	    break;
 	case EINTR:
 	    if (got_sigttou) {
-		/* Schedule SIGTTOU to be forwared to the command. */
+		/* Schedule SIGTTOU to be forwarded to the command. */
 		schedule_signal(iob->ec, SIGTTOU);
 	    }
 	    /* FALLTHROUGH */
@@ -1108,7 +1108,7 @@ signal_cb_pty(int signo, int what, void *v)
 		debug_return;
 	    }
 	}
-	/* Schedule signal to be forwared to the command. */
+	/* Schedule signal to be forwarded to the command. */
 	schedule_signal(ec, signo);
 	break;
     }
@@ -1327,7 +1327,7 @@ free_exec_closure_pty(struct exec_closure_pty *ec)
 }
 
 /*
- * Execute a command in a pty, potentially with I/O loggging, and
+ * Execute a command in a pty, potentially with I/O logging, and
  * wait for it to finish.
  * This is a little bit tricky due to how POSIX job control works and
  * we fact that we have two different controlling terminals to deal with.
diff --git a/src/sesh.c b/src/sesh.c
index f40ae752b..1f859c1ba 100644
--- a/src/sesh.c
+++ b/src/sesh.c
@@ -164,7 +164,7 @@ sesh_sudoedit(int argc, char *argv[])
     else /* invalid value */
 	debug_return_int(SESH_ERR_INVALID);
 
-    /* Align argv & argc to the beggining of the file list. */
+    /* Align argv & argc to the begining of the file list. */
     argv += 3;
     argc -= 3;