diff --git a/TODO b/TODO
index 8129c64..ce4ee91 100644
--- a/TODO
+++ b/TODO
@@ -1,17 +1,22 @@
-Makefile(
-
 *Todo:
-dirname
-basename
 mktemp
 ln
 nice
 nohup
 chmod
 chown
+split
+truncate
+date
+tee
+tr
+cut
 shuf
 id
 df
 dd
+stty
+stat
+sort
 printf
 test
diff --git a/coreutils/basename.c b/coreutils/basename.c
new file mode 100644
index 0000000..8eb20be
--- /dev/null
+++ b/coreutils/basename.c
@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include <string.h>
+#include <libgen.h>
+
+void remove_suffix(char *base, const char *suffix) {
+	char *ptr = base + strlen(base) - strlen(suffix);
+	if (!strcmp(ptr, suffix))
+		*ptr = '\0';
+}
+
+int main(const int argc, char **argv) {
+	char *suffix = NULL;
+	char *base = NULL;
+
+	int i;
+	for (i = 1; i < argc; i++) {
+		if (argv[i][0] != '-')
+			break;
+
+		else if (!strcmp(argv[i], "--help")) {
+			printf("basename [name] [suffix]\n");
+			return 0;
+		}
+	}
+
+	if (argc - i < 1) {
+		fprintf(stderr, "basename: missing operand\n");
+		return 1;
+	}
+
+	else if (argc - i == 2)
+		suffix = argv[i + 1];
+
+	base = basename(argv[i]);
+	if (suffix)
+		remove_suffix(base, suffix);
+
+	puts(base);
+	return 0;
+}
diff --git a/coreutils/cat.c b/coreutils/cat.c
index ac64efe..bd99efd 100644
--- a/coreutils/cat.c
+++ b/coreutils/cat.c
@@ -4,7 +4,7 @@
 #include <string.h>
 #include <unistd.h>
 
-unsigned int flag;
+unsigned int n_flag;
 unsigned int lines;
 void cat(const int fd) {
 	char buf[4024];
@@ -12,7 +12,7 @@ void cat(const int fd) {
 
 	while ((len = read(fd, buf, sizeof(buf))) > 0) {
 		for (ssize_t i = 0; i < len; i++) {
-			if (((i > 0) ? buf[i - 1] == '\n' : 1) && flag)
+			if (((i > 0) ? buf[i - 1] == '\n' : 1) && n_flag)
 				printf(" %d ", ++lines);
 
 			printf("%c", buf[i]);
@@ -27,7 +27,7 @@ int main(const int argc, const char **argv) {
 			break;
 
 		else if (!strcmp(argv[i], "-n"))
-			flag = 1;
+			n_flag = 1;
 
 		else if (!strcmp(argv[i], "--help")) {
 			printf("cat [-n (numerate)] [file1 file2 ...]\n");
diff --git a/coreutils/chmod.c b/coreutils/chmod.c
new file mode 100644
index 0000000..48fbe22
--- /dev/null
+++ b/coreutils/chmod.c
@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+//TODO
+int main(const int argc, const char **argv) {
+	unsigned int r_flag = 0;
+	unsigned int s_flag = 0;
+
+	int i;
+	for (i = 1; i < argc; i++) {
+		if (argv[i][0] != '-')
+			break;
+
+		else if (!strcmp(argv[i], "-r"))
+			r_flag = 1;
+
+		else if (!strcmp(argv[i], "-s"))
+			s_flag = 1;
+
+		else if (!strcmp(argv[i], "--help")) {
+			printf("chmod [-r (recursive)] [-s (silent)] [file1 file2...]\n");
+			return 0;
+		}
+	}
+
+	return 0;
+}
+
+
diff --git a/coreutils/dirname.c b/coreutils/dirname.c
new file mode 100644
index 0000000..a18acb8
--- /dev/null
+++ b/coreutils/dirname.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <libgen.h>
+
+int main(const int argc, const char **argv) {
+
+	if (argc <= 1) {
+		printf("dirname [dirname]\n");
+		return 1;
+	}
+
+	for (int i = 1; i < argc; i++)
+		puts(dirname(argv[i]));
+
+	return 0;
+}
+
diff --git a/coreutils/logname.c b/coreutils/logname.c
new file mode 100644
index 0000000..5139618
--- /dev/null
+++ b/coreutils/logname.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int main(void) {
+	char *p = getlogin();
+	if (p != NULL) {
+		puts(p);
+		return 0;
+	}
+
+	fprintf(stderr, "logname: %s\n", strerror(errno));
+	return 1;
+}
diff --git a/coreutils/micro-coreutils.c b/coreutils/micro-coreutils.c
deleted file mode 100644
index 4adb9d4..0000000
--- a/coreutils/micro-coreutils.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#include <stdio.h>
-
-#define MSG "Micro-coreutils: Version 0.1 LICENSE: wtfpl\n"
-
-int main(void) {
-	puts(MSG);
-	return 0;
-}