refactoring to more granular flakes and modules

flakes/common/nix_modules/essentials/unix_utils.func.sh

@@ -0,0 +1,65 @@
+# Check if ~/.config/environment exists and source all files within it
+if [ -d "$HOME/.config/environment" ]; then
+  for file in "$HOME/.config/environment/"*; do
+    if [ -r "$file" ]; then
+      if ! . "$file"; then
+        echo "Failed to source $file"
+      fi
+    fi
+  done
+fi
+
+htop_psg () {
+  htop -p $(psg $1 | awk '{r=r s $2;s=","} END{print r}')
+}
+
+htop_pid () {
+  htop -p $(ps -ef | awk -v proc=$1 '$3 == proc { cnt++;if (cnt == 1) { printf "%s",$2 } else { printf ",%s",$2 } }')
+}
+
+psg_kill() {
+  ps aux | grep -v "grep" | grep "${1}" | awk '{print $2}' | while read -r pid; do
+    if [ -n "${pid}" ]; then
+      echo "killing ${pid}"
+      kill -9 "${pid}" &> /dev/null
+    fi
+  done
+}
+
+psg_terminate() {
+  ps aux | grep -v "grep" | grep "${1}" | awk '{print $2}' | while read -r pid; do
+    if [ -n "${pid}" ]; then
+      echo "Terminating ${pid}"
+      kill -15 "${pid}" &> /dev/null
+    fi
+  done
+}
+
+psg_skill() {
+  ps aux | grep -v "grep" | grep "${1}" | awk '{print $2}' | while read -r pid; do
+    if [ -n "${pid}" ]; then
+      echo "Killing ${pid}"
+      sudo kill -9 "${pid}" &> /dev/null
+    fi
+  done
+}
+
+mail_clear() {
+  : > /var/mail/$USER
+}
+
+speedtest_fs () {
+  dir=$(pwd)
+  drive=$(df -h ${dir} | awk 'NR==2 {print $1}')
+  echo Testing read speeds on drive ${drive}
+  sudo hdparm -Tt ${drive}
+  test_file=$(date +%u%m%d)
+  test_file="${dir}/speedtest_fs_${test_file}"
+  echo
+  echo Testing write speeds into test file: ${test_file}
+  dd if=/dev/zero of=${test_file} bs=8k count=10k; rm -f ${test_file}
+}
+
+speedtest_internet () {
+  speedtest-cli
+}