diff --git a/bash.d/apt.sh b/bash.d/apt.sh
new file mode 100644
index 0000000..5de980c
--- /dev/null
+++ b/bash.d/apt.sh
@@ -0,0 +1,23 @@
+# show package information
+alias ac='apt-cache show'
+
+# search package
+alias acs='apt-cache search'
+
+# package versions policy
+alias acp='apt-cache policy'
+
+# update packages catalog
+alias agud='apt-get update'
+
+# upgrade forbidding package installation or removal
+alias agug='apt-get upgrade'
+
+# upgrade allowing package installation or removal
+alias agdu='apt-get dist-upgrade'
+
+# install packages
+alias agi='apt-get install'
+
+# clean packages cache
+alias agc='apt-get clean;apt-get autoremove'
diff --git a/bash.d/bash-commands.sh b/bash.d/bash-commands.sh
new file mode 100644
index 0000000..211a5cf
--- /dev/null
+++ b/bash.d/bash-commands.sh
@@ -0,0 +1,5 @@
+# change current directory to its parent
+alias ..='cd ..'
+
+# exit terminal
+alias x='exit'
diff --git a/bash.d/bash-completion.sh b/bash.d/bash-completion.sh
new file mode 100644
index 0000000..748a2b9
--- /dev/null
+++ b/bash.d/bash-completion.sh
@@ -0,0 +1,5 @@
+file='/usr/share/bash-completion/bash_completion'
+
+if [ -f "${file}" ] ; then
+    source "${file}"
+fi
diff --git a/bash.d/bash-history.sh b/bash.d/bash-history.sh
new file mode 100644
index 0000000..4a47ba3
--- /dev/null
+++ b/bash.d/bash-history.sh
@@ -0,0 +1,5 @@
+HISTCONTROL='ignorespace'
+
+HISTSIZE=-1
+
+HISTTIMEFORMAT='%Y%m%d %H%M%S '
diff --git a/bash.d/bash-prompt.sh b/bash.d/bash-prompt.sh
new file mode 100644
index 0000000..51b193c
--- /dev/null
+++ b/bash.d/bash-prompt.sh
@@ -0,0 +1,15 @@
+PS1="\
+┌ \t\
+ – \e[0;31m\${?}\e[0m\
+ – \e[0;32m\u\e[0m\
+ @ \e[0;33m\h\e[0m\
+"
+if [ "$(type -t __git_ps1)" == 'function' ] ; then
+    PS1="${PS1} –\e[0;35m\$(__git_ps1)\e[0m"
+fi
+PS1="${PS1}
+│\e[0;36m\${PWD}\e[0m
+└ "
+
+PS2="\
+└ "
diff --git a/bash.d/batcat.sh b/bash.d/batcat.sh
new file mode 100644
index 0000000..abe0b64
--- /dev/null
+++ b/bash.d/batcat.sh
@@ -0,0 +1 @@
+alias bat='batcat'
diff --git a/bash.d/byobu.sh b/bash.d/byobu.sh
new file mode 100644
index 0000000..1eb6d63
--- /dev/null
+++ b/bash.d/byobu.sh
@@ -0,0 +1 @@
+alias bb='byobu'
diff --git a/bash.d/chmod.sh b/bash.d/chmod.sh
new file mode 100644
index 0000000..357d4dc
--- /dev/null
+++ b/bash.d/chmod.sh
@@ -0,0 +1,5 @@
+# change mode as directory
+alias cmd='chmod 755'
+
+# change mode as file
+alias cmf='chmod 644'
diff --git a/bash.d/chown.sh b/bash.d/chown.sh
new file mode 100644
index 0000000..4beb36d
--- /dev/null
+++ b/bash.d/chown.sh
@@ -0,0 +1,5 @@
+# change owner as root
+alias cor='chown 0:0'
+
+# change owner as user
+alias cou='chown 1000:1000'
diff --git a/bash.d/clear.sh b/bash.d/clear.sh
new file mode 100644
index 0000000..350a925
--- /dev/null
+++ b/bash.d/clear.sh
@@ -0,0 +1,2 @@
+# clear terminal
+alias c='clear'
diff --git a/bash.d/git.sh b/bash.d/git.sh
new file mode 100644
index 0000000..7417e4c
--- /dev/null
+++ b/bash.d/git.sh
@@ -0,0 +1,190 @@
+# add to index
+alias ga='git add'
+
+# add all to index
+alias gaa='git add --all'
+
+# create a branch
+alias gb='git branch'
+
+# delete a branch
+alias gbd='git branch --delete'
+
+# force a branch deletion
+alias gbdf='git branch --delete --force'
+
+# list branches
+alias gbl='git branch --all --list --verbose --verbose'
+
+# set the link to a remote branch from a local branch
+alias gbu='git branch -u'
+
+# clone a remote repository
+alias gc='git clone'
+
+# clean untracked files
+alias gcf='git clean -d --force'
+
+# index all and commit
+alias gacm='git add --all;git commit -m'
+
+# commit the index
+alias gcm='git commit -m'
+
+# redo the last commit with a different message
+alias gcma='git commit --amend -m'
+
+# make a root commit
+alias gcmr='git commit --allow-empty --allow-empty-message -m ""'
+
+# commit the index and sign
+alias gcms='git commit --gpg-sign -m'
+
+# switch to a branch or checkout file(s) from a commit
+alias gco='git checkout'
+
+# checkout an orphan branch
+alias gcoo='git checkout --orphan'
+
+# checkout development branch
+alias gcod='git checkout dev'
+
+# checkout feature branch
+alias gcof='git checkout f'
+
+# pick a commit
+alias gcp='git cherry-pick'
+
+# abort the commit pick
+alias gcpa='git cherry-pick --abort'
+
+# continue the commit pick
+alias gcpc='git cherry-pick --continue'
+
+# configure the user name
+alias gcun='git config user.name'
+
+# configure the user email
+alias gcue='git config user.email'
+
+# differences from last or between commits
+alias gd='git diff'
+
+# display what is indexed in cache
+alias gdc='git diff --cached'
+
+# indexed character-level differences
+alias gdcw='git diff --cached --word-diff-regex=.'
+
+# differences via external tool
+alias gdt='git difftool --dir-diff'
+
+# character-level differences
+alias gdw='git diff --word-diff-regex=.'
+
+# fetch from the remote repository
+alias gf='git fetch --tags --verbose'
+
+# fetch from remote repository and prune local orphan branches
+alias gfp='git fetch --prune --tags --verbose'
+
+# garbage collect all orphan commits
+alias ggc='git reflog expire --expire=now --all;git gc --prune=now'
+
+# initialize a new repository
+alias gi='git init'
+
+# initialize a new bare repository
+alias gib='git init --bare'
+
+# log commits history
+alias gl='git log --all --graph \
+--format="%C(auto)%h%d %C(red)%ai%C(auto) %an%n%B"'
+
+# log commits history with patches
+alias glp='git log --all --graph \
+--format="%C(auto)%h%d %C(red)%ai%C(auto) %an%n%B" --patch'
+
+# log medium information
+alias glm='git log --all --decorate --graph --pretty=medium'
+
+# fast-forward to remote branch
+alias gmf='git merge --ff-only'
+
+# do a merge commit
+alias gmc='git merge --no-ff -m'
+
+# abort the current merge commit
+alias gma='git merge --abort'
+
+# squash a branch and index its modifications
+alias gms='git merge --squash'
+
+# merge via external tool
+alias gmt='git mergetool'
+
+# push to the remote repository
+alias gp='git push --tags --verbose'
+
+# delete from the remote repository
+alias gpd='git push --delete --verbose'
+
+# force the push to the remote repository
+alias gpf='git push --tags --verbose --force'
+
+# rebase current branch onto another
+alias grb='git rebase'
+
+# abort current rebase
+alias grba='git rebase --abort'
+
+# continue current rebase
+alias grbc='git rebase --continue'
+
+# force rebase without fast-forward
+alias grbf='git rebase --no-ff'
+
+# rebase interactively
+alias grbi='git rebase --interactive'
+
+# list all remote repositories
+alias grm='git remote'
+
+# add a new remote repository
+alias grma='git remote add'
+
+# list remote repositories
+alias grml='git remote --verbose'
+
+# show a connection to a repository
+alias grms='git remote show'
+
+# set the location of the remote repository
+alias grmu='git remote set-url'
+
+# remove file(s) from index or move current branch pointer
+alias grs='git reset'
+
+# move current branch pointer to the development branch
+alias grsd='git reset dev'
+
+# wipe modifications or reset current branch to another commit
+alias grsh='git reset --hard'
+
+# reset current branch to the development branch
+alias grshd='git reset --hard dev'
+
+# current state of repository
+alias gs='git status --untracked-files=all'
+
+# show a commit
+alias gsh='git show'
+
+# tag a commit
+alias gt='git tag'
+
+# delete a tag
+alias gtd='git tag --delete'
+
+# tag a commit and sign
+alias gts='git tag --sign'
diff --git a/bash.d/gnupg.sh b/bash.d/gnupg.sh
new file mode 100644
index 0000000..715e3ab
--- /dev/null
+++ b/bash.d/gnupg.sh
@@ -0,0 +1,3 @@
+alias gpgoff='gpgconf --kill gpg-agent'
+
+alias gpgtty='gpg-connect-agent updatestartuptty /bye'
diff --git a/bash.d/grep.sh b/bash.d/grep.sh
new file mode 100644
index 0000000..6a9c514
--- /dev/null
+++ b/bash.d/grep.sh
@@ -0,0 +1,2 @@
+# grep from current directory with regex
+alias g='grep --directories recurse --line-number --regexp'
diff --git a/bash.d/kill.sh b/bash.d/kill.sh
new file mode 100644
index 0000000..dbe03d1
--- /dev/null
+++ b/bash.d/kill.sh
@@ -0,0 +1,5 @@
+# kill a process by id
+alias k='kill'
+
+# force kill a process by id
+alias kf='kill -9'
diff --git a/bash.d/killall.sh b/bash.d/killall.sh
new file mode 100644
index 0000000..76c30a7
--- /dev/null
+++ b/bash.d/killall.sh
@@ -0,0 +1,5 @@
+# kill all instances of a process by name
+alias ka='killall'
+
+# force kill all instances of a process by name
+alias kaf='killall -9'
diff --git a/bash.d/ls.sh b/bash.d/ls.sh
new file mode 100644
index 0000000..c820fb5
--- /dev/null
+++ b/bash.d/ls.sh
@@ -0,0 +1,2 @@
+# list current directory entries
+alias l='ls --all --color -l -p --time-style="+%Y%m%d-%H%M%S%-:::z"'
diff --git a/bash.d/lsblk.sh b/bash.d/lsblk.sh
new file mode 100644
index 0000000..fca212a
--- /dev/null
+++ b/bash.d/lsblk.sh
@@ -0,0 +1 @@
+alias lb='lsblk --noempty --output NAME,SIZE,TYPE,FSTYPE,MOUNTPOINTS'
diff --git a/bash.d/micro.sh b/bash.d/micro.sh
new file mode 100644
index 0000000..de78a1d
--- /dev/null
+++ b/bash.d/micro.sh
@@ -0,0 +1 @@
+alias e='micro'
diff --git a/bash.d/mkdir.sh b/bash.d/mkdir.sh
new file mode 100644
index 0000000..ba8d113
--- /dev/null
+++ b/bash.d/mkdir.sh
@@ -0,0 +1,5 @@
+# make a directory
+alias md='mkdir'
+
+# make a directory after making its parents
+alias mdp='mkdir --parents'
diff --git a/bash.d/mount-lxc.sh b/bash.d/mount-lxc.sh
new file mode 100644
index 0000000..a0b3ace
--- /dev/null
+++ b/bash.d/mount-lxc.sh
@@ -0,0 +1,31 @@
+function mrc {
+local container="${1}"
+local f
+    for f in 'dev' 'dev/pts' 'proc' 'sys' ; do
+        mount --bind "/${f}" "overlay/mount/var/lib/lxc/${container}/squashfs-root/${f}"
+    done
+}
+
+function crc {
+local container="${1}"
+    shift
+    chroot "overlay/mount/var/lib/lxc/${container}/squashfs-root" "${@}"
+}
+
+function urc {
+local container="${1}"
+    for f in 'sys' 'proc' 'dev/pts' 'dev' ; do
+        umount --lazy "overlay/mount/var/lib/lxc/${container}/squashfs-root/${f}"
+    done
+}
+
+
+function mmc {
+local container="${1}"
+    mount --bind '/deb' "overlay/mount/var/lib/lxc/${container}/squashfs-root/deb"
+}
+
+function umc {
+local container="${1}"
+    umount "overlay/mount/var/lib/lxc/${container}/squashfs-root/deb"
+}
diff --git a/bash.d/mount.sh b/bash.d/mount.sh
new file mode 100644
index 0000000..4e91b62
--- /dev/null
+++ b/bash.d/mount.sh
@@ -0,0 +1,76 @@
+alias m='mount'
+
+
+function mo {
+local directory="${1}"
+local file
+if [ "${directory}" ] ; then
+    directory="$(realpath "${directory}")"
+    file="${directory}/filesystem.squashfs"
+    if mkdir 'overlay' ; then
+        cd 'overlay'
+        mkdir {lower,upper,work,mount}
+        if mount "${file}" 'lower' ; then
+            mount -t 'overlay' 'overlay' 'mount' \
+-o lowerdir='lower',upperdir='upper',workdir='work'
+        fi
+        cd ..
+    fi
+else
+    echo 'KO: directory?'
+fi
+}
+
+function uo {
+cd 'overlay'
+if umount 'mount' ; then
+    rmdir 'mount'
+    rm --recursive 'upper' 'work'
+    if umount 'lower' ; then
+        rmdir 'lower'
+    fi
+fi
+cd ..
+rmdir 'overlay'
+}
+
+
+function mr {
+for f in 'dev' 'dev/pts' 'proc' 'sys' ; do
+    mount --bind "/${f}" "overlay/mount/${f}"
+done
+}
+
+alias cr='chroot overlay/mount'
+
+function ur {
+for f in 'dev/pts' 'dev' 'proc' 'sys' ; do
+    umount --lazy "overlay/mount/${f}"
+done
+}
+
+
+function mm {
+mount --bind '/deb' 'overlay/mount/deb'
+}
+
+function um {
+umount 'overlay/mount/deb'
+}
+
+
+function ms {
+local directory="${1}"
+local level="${2}"
+if [ "${directory}" ] ; then
+    if mkdir "${directory}" ; then
+        [ "${level}" ] || level='18'
+        cp overlay/mount/{vmlinuz,initrd.img} "${directory}"
+        mksquashfs \
+'overlay/mount' "${directory}/filesystem.squashfs" \
+-b '1M' \
+-comp 'zstd' -Xcompression-level "${level}"
+        chown --recursive 1000:1000 "${directory}"
+    fi
+fi
+}
diff --git a/bash.d/newsboat.sh b/bash.d/newsboat.sh
new file mode 100644
index 0000000..b90f01b
--- /dev/null
+++ b/bash.d/newsboat.sh
@@ -0,0 +1 @@
+alias nb='newsboat'
diff --git a/bash.d/otpclient-cli.sh b/bash.d/otpclient-cli.sh
new file mode 100644
index 0000000..f2fa2ba
--- /dev/null
+++ b/bash.d/otpclient-cli.sh
@@ -0,0 +1,5 @@
+# display otp code
+alias pd='otpclient-cli show -a'
+
+# list otp accounts
+alias pl='otpclient-cli list'
diff --git a/bash.d/pass.sh b/bash.d/pass.sh
new file mode 100644
index 0000000..f90153e
--- /dev/null
+++ b/bash.d/pass.sh
@@ -0,0 +1,5 @@
+# display pass entry's content
+alias p='pass'
+
+# copy passphrase into clipboard
+alias pc='pass --clip'
diff --git a/bash.d/proxy.sh b/bash.d/proxy.sh
new file mode 100644
index 0000000..a5713ad
--- /dev/null
+++ b/bash.d/proxy.sh
@@ -0,0 +1,8 @@
+function socks {
+local value
+    case "${1}" in
+        'on') value='manual' ;;
+        *) value='none' ;;
+    esac
+    gsettings set 'org.gnome.system.proxy' 'mode' "${value}"
+}
diff --git a/bash.d/ps.sh b/bash.d/ps.sh
new file mode 100644
index 0000000..791a664
--- /dev/null
+++ b/bash.d/ps.sh
@@ -0,0 +1,2 @@
+# look for a string in processes names
+alias pg='ps -A | grep'
diff --git a/bash.d/rsync.sh b/bash.d/rsync.sh
new file mode 100644
index 0000000..ddd35b2
--- /dev/null
+++ b/bash.d/rsync.sh
@@ -0,0 +1,8 @@
+# synchronize
+alias rs='rsync --archive --partial --progress --verbose --no-inc-recursive'
+
+# synchronize and delete after
+alias rsda='rsync --archive --partial --progress --verbose --delete-after'
+
+# synchronize and delete before
+alias rsdb='rsync --archive --partial --progress --verbose --delete-before'
diff --git a/bash.d/tar.sh b/bash.d/tar.sh
new file mode 100644
index 0000000..2c1f18c
--- /dev/null
+++ b/bash.d/tar.sh
@@ -0,0 +1,3 @@
+alias tc='tar --verbose --create --auto-compress --file'
+
+alias tx='tar --verbose --extract --file'