diff --git a/home_external/.bash_aliases b/home_external/.bash_aliases
index aaa70e2..c88e541 100644
--- a/home_external/.bash_aliases
+++ b/home_external/.bash_aliases
@@ -5,20 +5,25 @@ if [ "$TERM" == 'xterm-kitty' ]; then
    alias diff='kitty +kitten diff'
 fi
 
-DEFAULT_RSYNC='--info=ALL --recursive --delay-updates --human-readable --links --hard-links --perms'
+COMMON_RSYNC='--info=ALL --recursive --delay-updates --human-readable --links --hard-links --perms'
+export RSDEF="$COMMON_RSYNC --checksum"
+export RSBKP="$RSDEF --times --group --owner --delete"
+export RSMOV="$RSDEF --remove-source-files"
+export RSUPD="$COMMON_RSYNC --update --times"
+export RSCPY="$COMMON_RSYNC --ignore-times"
 
 alias l='ls -l -v --all --human-readable --classify --group-directories-first' # -lvahF --group-directories-first
 alias lt=='l --time-style=long-iso'
 alias r='reset'
 alias ..='cd ..'
 alias refresh_bashrc='. ~/.bashrc' # alternatively: 'source ~/.bashrc'
-alias rsync_default="rsync $DEFAULT_RSYNC --checksum"
+alias rsync_default="rsync $RSDEF"
 # source /usr/share/bash-completion/completions/rsync
 # complete -F _rsync rsync_default
-alias rsync_backup="rsync $DEFAULT_RSYNC --checksum --times --group --owner --delete"
-alias rsync_move="rsync $DEFAULT_RSYNC --checksum --remove-source-files"
-alias rsync_update="rsync $DEFAULT_RSYNC --update --times"
-alias rsync_copy="rsync $DEFAULT_RSYNC --ignore-times"
+alias rsync_backup="rsync $RSBKP"
+alias rsync_move="rsync $RSMOV"
+alias rsync_update="rsync $RSUPD"
+alias rsync_copy="rsync $RSCPY"
 alias copy_link='cp --no-dereference --recursive --preserve=all --link' # not --force to make it optional
 alias off='systemctl poweroff'
 alias nnn='nnn -dHrR'
diff --git a/scripts/archive_and_compress.sh b/scripts/archive_and_compress.sh
index b4648d2..6b282eb 100755
--- a/scripts/archive_and_compress.sh
+++ b/scripts/archive_and_compress.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
 source=$1
 destinationPart=${1%/}; # cut off trailing "/"
-# tar cfv $destinationPart.tar $source && xz $destinationPart.tar;
-tar c -I"xz -v" -vf $destinationPart.tar.xz $source
+# tar cfv "$destinationPart.tar" "$source" && xz "$destinationPart.tar";
+tar c -I"xz -v" -vf "$destinationPart.tar.xz" "$source"
diff --git a/scripts/decompress_and_unarchive.sh b/scripts/decompress_and_unarchive.sh
index e2ed14c..ddff8ca 100755
--- a/scripts/decompress_and_unarchive.sh
+++ b/scripts/decompress_and_unarchive.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
 source=$1;
 # archive=${source%.xz}; # cut off trailing ".xz"
-# unxz $source && tar xfv $archive
-tar x -I"unxz -v" -vf $source
+# unxz "$source" && tar xfv "$archive"
+tar x -I"unxz -v" -vf "$source"