diff --git a/cpio b/cpio
new file mode 100644
index 0000000..f00721f
--- /dev/null
+++ b/cpio
@@ -0,0 +1,5 @@
+# Create a specific cpio archive:
+ls | cpio --create > <path/to/archive.cpio>
+
+# Extract a specific cpio archive:
+cpio --extract --make-directories < <path/to/archive.cpio>
diff --git a/docker b/docker
index e252582..178262f 100644
--- a/docker
+++ b/docker
@@ -7,6 +7,9 @@ docker build -t <image-tag-name> <path-of-Dockerfile>
 # To start a container with an interactive shell:
 docker run -ti <image-name> /bin/bash
 
+# To run a docker container in the background:
+docker run -d <image-name>
+
 # To "shell" into a running container (docker-1.3+):
 docker exec -ti <container-name> bash
 
@@ -28,12 +31,18 @@ docker ps
 # To list all containers:
 docker ps -a
 
+# To remove all stopped containers:
+docker container prune
+
 # To remove all stopped containers:
 docker rm $(docker ps -qa)
 
 # To list all images:
 docker images
 
+# To only see all images id:
+docker image ls -q
+
 # To remove all untagged images:
 docker rmi $(docker images | grep "^<none>" | awk '{print $3}')
 
@@ -46,7 +55,7 @@ docker save -o <archive-name>.tar <image-name>
 # To restore image from a saved tar archive:
 docker load -i <archive-name>.tar
 
-# To remove an image image:
+# To remove an image:
 docker image rm <image-name-or-id>
 
 # To tag an image:
@@ -69,3 +78,27 @@ docker network connect "<network_id|name>" "<container_id|name>"
 
 # Disconnect a specific container from network:
 docker network disconnect "<network_id|name>" "<container_id|name>"
+
+# To see the logs of a background or stopped container:
+docker logs <container-id>
+
+# To publish a port of container on localhost:
+docker run -p <localhost-port>:<container-port> <image-name>
+
+# To create a docker volume:
+docker volume create <volume-name>
+
+# To see information of a docker volume:
+docker volume inspect <volume-name>
+
+# To use a volume in the container:
+docker run -v <volume-name>:<folder-path-in-container> <image>
+
+# To link current folder between host and container for development:
+docker run <image-name> -v $(pwd):<folder-path-in-container> <image>
+
+# To copy a file from the running container to host mechine:
+docker cp <container-id>:<path/to/file> <host/copy/path>
+
+# To copy a file from host mechine to the running container:
+docker cp <host/copy/path> <container-id>:<path/to/file>
diff --git a/find b/find
index 89259d3..a02b1aa 100644
--- a/find
+++ b/find
@@ -78,3 +78,6 @@ find -L /usr/ports/packages -type l
 # To find and run multiple shell commands (without multiple execs):
 # See: https://stackoverflow.com/questions/5119946/find-exec-with-multiple-commands
 find . -type f -exec sh -c "echo '{}'; cat '{}';" \;
+
+# To find files that are newer than a file:
+find <path> -newer <target-file>
diff --git a/fmt b/fmt
new file mode 100644
index 0000000..322ec7c
--- /dev/null
+++ b/fmt
@@ -0,0 +1,2 @@
+# To format lines, 50 words in each line:
+cat <file> | fmt -w 50
diff --git a/jobs b/jobs
new file mode 100644
index 0000000..a464f20
--- /dev/null
+++ b/jobs
@@ -0,0 +1,11 @@
+# To see the background running commands:
+jobs
+
+# To see the background running commands with PID:
+jobs -l
+
+# To see the running jobs only:
+jobs -r
+
+# To see stopped jobs only:
+jobs -s
diff --git a/ls b/ls
index b10d89c..a19fe44 100644
--- a/ls
+++ b/ls
@@ -4,7 +4,7 @@ ls <dir>
 # To display everything in <dir>, including hidden files:
 ls -a <dir>
 
-# To display all files, along with the size (with unit suffixes) and timestamp
+# To display all files, along with the size (with unit suffixes) and timestamp:
 ls -lh <dir>
 
 # To display files, sorted by size:
@@ -28,3 +28,6 @@ ls -1
 # To show ACLs (MacOS):
 # see also `cheat chmod` for `/bin/chmod` options for ACLs
 /bin/ls -le
+
+# To show all the subtree files (Recursive Mode):
+ls -R
diff --git a/man b/man
index 1c86ad1..6d231c8 100644
--- a/man
+++ b/man
@@ -6,3 +6,6 @@ man 7 ascii
 
 # To see config:
 cat /private/etc/man.conf
+
+# To check the existence of a keyword in all of man pages:
+man -k <keyword>
diff --git a/tar b/tar
index 10937da..66b8633 100644
--- a/tar
+++ b/tar
@@ -31,10 +31,13 @@ tar -cjvf /path/to/foo.tar.bz2 /path/to/foo/
 # To list the content of an .tar.bz2 archive:
 tar -tjvf /path/to/foo.tar.bz2
 
-# To create a .tgz archive and exclude all jpg,gif,... from the tgz
+# To create a .tgz archive and exclude all jpg,gif,... from the tgz:
 tar -czvf /path/to/foo.tgz --exclude=\*.{jpg,gif,png,wmv,flv,tar.gz,zip} /path/to/foo/
 
 # To use parallel (multi-threaded) implementation of compression algorithms:
 tar -z ... -> tar -Ipigz ...
 tar -j ... -> tar -Ipbzip2 ...
 tar -J ... -> tar -Ipixz ...
+
+# To append a new file to an old tar archive:
+tar -rf <archive.tar> <new-file-to-append>
diff --git a/touch b/touch
new file mode 100644
index 0000000..05a33b8
--- /dev/null
+++ b/touch
@@ -0,0 +1,9 @@
+# To change a file's modification time:
+touch -d <time> <file>
+touch -d 12am <file>
+touch -d "yesterday 6am" <file>
+touch -d "2 days ago 10:00" <file>
+touch -d "tomorrow 04:00" <file>
+
+# To put the timestamp of a file on another:
+touch -r <refrence-file> <target-file>