diff --git a/1A/Algo/tp/C/tp7/MacOSX15.5.sdk b/1A/Algo/tp/C/tp7/MacOSX15.5.sdk
deleted file mode 120000
index 1ce0f37..0000000
--- a/1A/Algo/tp/C/tp7/MacOSX15.5.sdk
+++ /dev/null
@@ -1 +0,0 @@
-MacOSX.sdk
\ No newline at end of file
diff --git a/2A/Anglais/Orale.docx b/2A/Anglais/Orale.docx
new file mode 100644
index 0000000..90e84c9
Binary files /dev/null and b/2A/Anglais/Orale.docx differ
diff --git a/2A/PPP/s1/Communication_professionnelle/LettreMotivationSTM.pdf b/2A/PPP/s1/Communication_professionnelle/LettreMotivation.pdf
similarity index 75%
rename from 2A/PPP/s1/Communication_professionnelle/LettreMotivationSTM.pdf
rename to 2A/PPP/s1/Communication_professionnelle/LettreMotivation.pdf
index f3615e6..a72807a 100644
Binary files a/2A/PPP/s1/Communication_professionnelle/LettreMotivationSTM.pdf and b/2A/PPP/s1/Communication_professionnelle/LettreMotivation.pdf differ
diff --git a/2A/PPP/s1/PPP/10conseilsPPP.docx b/2A/PPP/s1/PPP/10conseilsPPP.docx
new file mode 100644
index 0000000..d5f4684
Binary files /dev/null and b/2A/PPP/s1/PPP/10conseilsPPP.docx differ
diff --git a/2A/systeme/tp/2_tp/ex1 b/2A/systeme/tp/2_tp/ex1
new file mode 100755
index 0000000..3651936
Binary files /dev/null and b/2A/systeme/tp/2_tp/ex1 differ
diff --git a/2A/systeme/tp/2_tp/ex1.c b/2A/systeme/tp/2_tp/ex1.c
new file mode 100644
index 0000000..65f44a1
--- /dev/null
+++ b/2A/systeme/tp/2_tp/ex1.c
@@ -0,0 +1,33 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <errno.h>
+#include <time.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+
+void showFileInfos(char *fileName) {
+    struct stat infos;
+
+    if (stat(fileName, &infos) == -1) {
+         perror("stat");
+         exit(EXIT_SUCCESS);
+    }
+
+    printf("Nom : %s\nTaille en octets : %lld octets\nDate modif : %lld s\n", \
+            fileName, (long long) infos.st_size, (long long) infos.st_mtime);
+
+}
+
+int main(int argc, char* argv[])
+{
+    if(argc != 2){
+        fprintf(stderr, "Usage : %s <pathName>\n", argv[0]);
+        exit(EXIT_FAILURE);
+    }
+    
+    showFileInfos(argv[1]);
+    
+    return 0;
+}
\ No newline at end of file
diff --git a/2A/systeme/tp/2_tp/ex2 b/2A/systeme/tp/2_tp/ex2
new file mode 100755
index 0000000..7ddc427
Binary files /dev/null and b/2A/systeme/tp/2_tp/ex2 differ
diff --git a/2A/systeme/tp/2_tp/ex2.c b/2A/systeme/tp/2_tp/ex2.c
new file mode 100644
index 0000000..d551e96
--- /dev/null
+++ b/2A/systeme/tp/2_tp/ex2.c
@@ -0,0 +1,52 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <time.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <dirent.h>
+
+void showFileInfos(char *fileName) {
+    struct stat infos;
+
+    if (stat(fileName, &infos) == -1) {
+         perror("stat");
+         exit(EXIT_SUCCESS);
+    }
+
+    printf("Nom : %s\nTaille en octets : %lld octets\nDate modif : %lld s\n", \
+            fileName, (long long) infos.st_size, (long long) infos.st_mtime);
+
+}
+
+// affiche tout les fichiers dans son rep par ordre de création
+void listDirContent(char *dirName){
+    DIR *dir;
+    struct dirent *dp;
+
+    if((dir=opendir(dirName)) == NULL){
+        perror("opendir");
+        exit(errno);
+    }
+
+    while((dp =readdir(dir)) != NULL) {
+        printf("%s\n", dp->d_name);
+    }
+    
+    printf("\n");
+
+    closedir(dir);
+}
+
+int main(int argc, char* argv[])
+{
+    if(argc != 2){
+        fprintf(stderr, "Usage : %s <pathName>\n", argv[0]);
+        exit(EXIT_FAILURE);
+    }
+    
+    // showFileInfos(argv[1]);
+    listDirContent(argv[1]);
+
+    return 0;
+}
\ No newline at end of file
diff --git a/2A/systeme/tp/2_tp/ex3 b/2A/systeme/tp/2_tp/ex3
new file mode 100755
index 0000000..fdaa0ef
Binary files /dev/null and b/2A/systeme/tp/2_tp/ex3 differ
diff --git a/2A/systeme/tp/2_tp/ex3.c b/2A/systeme/tp/2_tp/ex3.c
new file mode 100644
index 0000000..880d8c4
--- /dev/null
+++ b/2A/systeme/tp/2_tp/ex3.c
@@ -0,0 +1,88 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <time.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <dirent.h>
+#include <string.h>
+
+void showFileInfos(char *fileName) {
+    struct stat infos;
+
+    if (stat(fileName, &infos) == -1) {
+         perror("stat");
+         exit(EXIT_SUCCESS);
+    }
+
+    printf("Nom : %s\nTaille en octets : %lld octets\nDate modif : %lld s\n\n", \
+            fileName, (long long) infos.st_size, (long long) infos.st_mtime);
+
+}
+
+// affiche tout les fichiers dans son rep par ordre de création
+int listDirContent(char *dirName){
+    DIR *dir;
+    int len;
+    struct dirent *dp;
+
+    if((dir=opendir(dirName)) == NULL){
+        perror("opendir");
+        exit(errno);
+    }
+
+    while((dp =readdir(dir)) != NULL) {
+        printf("%s\n", dp->d_name);
+    }
+
+    printf("\n");
+
+    closedir(dir);
+    return 0;
+}
+
+int showDir(char *dirName){
+    DIR *dir;
+    int len = strlen(dirName);
+    struct dirent *dp;
+
+    if((dir=opendir(dirName)) == NULL){
+        perror("opendir");
+        exit(errno);
+    }
+
+    while((dp =readdir(dir)) != NULL) {
+        char * path; // dirName + / + dp->d_name
+
+        if((path=malloc(len+strlen(dp->d_name)+2)) == NULL){
+            perror("malloc");
+            exit(errno);
+        }
+
+        strcpy(path, dirName); 
+        strcat(path, "/");
+        strcat(path, dp->d_name);
+
+        showFileInfos(path);
+
+        free(path);
+    }
+
+    closedir(dir);
+    return 0;
+}
+
+int main(int argc, char* argv[])
+{
+    int rep;
+    if(argc != 2){
+        fprintf(stderr, "Usage : %s <pathName>\n", argv[0]);
+        exit(EXIT_FAILURE);
+    }
+    
+    // showFileInfos(argv[1]);
+    // listDirContent(argv[1]);
+    rep = showDir(argv[1]);
+
+    return 0;
+}
\ No newline at end of file
diff --git a/2A/systeme/tp/2_tp/ex4 b/2A/systeme/tp/2_tp/ex4
new file mode 100755
index 0000000..a04bb60
Binary files /dev/null and b/2A/systeme/tp/2_tp/ex4 differ
diff --git a/2A/systeme/tp/2_tp/ex4.c b/2A/systeme/tp/2_tp/ex4.c
new file mode 100644
index 0000000..9c20116
--- /dev/null
+++ b/2A/systeme/tp/2_tp/ex4.c
@@ -0,0 +1,97 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <time.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <dirent.h>
+#include <string.h>
+
+void showFileInfos(char *fileName) {
+    struct stat infos;
+
+    if (stat(fileName, &infos) == -1) {
+         perror("stat ");
+         exit(EXIT_SUCCESS);
+    }
+
+    printf("Nom : %s\nTaille en octets : %lld octets\nDate modif : %lld s\n\n", \
+            fileName, (long long) infos.st_size, (long long) infos.st_mtime);
+
+}
+
+// affiche tout les fichiers dans son rep par ordre de création
+int listDirContent(char *dirName){
+    DIR *dir;
+    int len;
+    struct dirent *dp;
+
+    if((dir=opendir(dirName)) == NULL){
+        perror("opendir");
+        exit(errno);
+    }
+
+    while((dp =readdir(dir)) != NULL) {
+        printf("%s\n", dp->d_name);
+    }
+
+    printf("\n");
+
+    closedir(dir);
+    return 0;
+}
+
+int showDir(char *dirName){
+    DIR *dir;
+    int len = strlen(dirName);
+    struct dirent *dp;
+    int rep;
+
+    if((dir=opendir(dirName)) == NULL){
+        perror("opendir");
+        exit(errno);
+    }
+
+    showFileInfos(dirName);
+
+    while((dp =readdir(dir)) != NULL) {
+        char * path; // dirName + / + dp->d_name
+
+        if(strcmp(dp->d_name, ".") == 0 || strcmp(dp->d_name, "..") == 0){
+            continue; //passe au tour de boucle suivant
+        }
+
+        if((path=malloc(len+strlen(dp->d_name)+2)) == NULL){
+            perror("malloc");
+            exit(errno);
+        }
+
+        strcpy(path, dirName); 
+        strcat(path, "/");
+        strcat(path, dp->d_name);
+
+        if(dp->d_type == DT_DIR) {
+            rep = showDir(path);
+        }
+        else showFileInfos(path);
+
+        free(path);
+    }
+
+    closedir(dir);
+    return 0;
+}
+
+int main(int argc, char* argv[])
+{
+    int rep;
+    if(argc != 2){
+        fprintf(stderr, "Usage : %s <pathName>\n", argv[0]);
+        exit(EXIT_FAILURE);
+    }
+
+    rep = showDir(argv[1]);
+
+    return 0;
+}
+// si rep et != . et ..
\ No newline at end of file