Replaced use of deprecated ioutil functions by modern equivalents

src/client/cmdMisc/ls.go

 package cmdMisc
 
 import (
-	"io/ioutil"
 	u "nexus-client/utils"
+	"os"
 )
 
 type Ls struct {
@@ -42,7 +42,7 @@ func (cmd *Ls) Run(args []string) int {
 
 // List files in the specified directory.
 func (cmd *Ls) listDir(dir string) {
-	fis, err := ioutil.ReadDir(dir)
+	fis, err := os.ReadDir(dir)
 	if err != nil {
 		u.PrintlnErr("Failed reading \"" + dir + "\" directory: " + err.Error())
 		return

src/libclient/utils/strings.go

@@ -2,8 +2,8 @@ package utils
 
 import (
 	"fmt"
-	"io/ioutil"
 	"net/mail"
+	"os"
 	"strings"
 )
 
@@ -28,7 +28,7 @@ func Str2UsbDevices(s string) []string {
 
 // Returns the content of file as a string
 func FileToString(file string) (string, error) {
-	content, err := ioutil.ReadFile(file)
+	content, err := os.ReadFile(file)
 	if err != nil {
 		return "", err
 	}

src/server/vms/vms.go

@@ -3,7 +3,6 @@ package vms
 import (
 	"encoding/base64"
 	"errors"
-	"io/ioutil"
 	"math"
 	"nexus-common/caps"
 	"nexus-common/params"
@@ -331,7 +330,7 @@ func (vms *VMs) prepareStartVM(vmID uuid.UUID, attachPwd string) (*osexec.Cmd, *
 	pwdBase64 := base64.StdEncoding.EncodeToString([]byte(spicePwd))
 	content := []byte(pwdBase64)
 	spicePwdFile := filepath.Join(vm.dir, vmSecretFile)
-	if err := ioutil.WriteFile(spicePwdFile, content, 0600); err != nil {
+	if err := os.WriteFile(spicePwdFile, content, 0600); err != nil {
 		msg := prefix + "error creating secret file: " + err.Error()
 		log.Error(msg)
 		return nil, nil, "", 0, 0, errors.New(msg)