diff --git a/.eslintrc.json b/.eslintrc.json
index af3e032..aac0c9e 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -39,6 +39,7 @@
         "import/prefer-default-export": "off",
         "no-useless-constructor": "off",
         "@typescript-eslint/no-useless-constructor": 2,
-        "import/extensions": "off"
+        "import/extensions": "off",
+        "consistent-return": "off"
     }
-}
\ No newline at end of file
+}
diff --git a/src/class/AccountUtil.ts b/src/class/AccountUtil.ts
index d528e5b..7b2243c 100644
--- a/src/class/AccountUtil.ts
+++ b/src/class/AccountUtil.ts
@@ -4,6 +4,8 @@ import { randomBytes } from 'crypto';
 import { AccountInterface } from '../models';
 import { Client } from '..';
 
+export const LINUX_USERNAME_REGEX = /^[a-z][-a-z0-9]*$/;
+
 export default class AccountUtil {
   public client: Client;
 
diff --git a/src/class/Util.ts b/src/class/Util.ts
index 5e9f2f2..d4e7ddb 100644
--- a/src/class/Util.ts
+++ b/src/class/Util.ts
@@ -311,16 +311,9 @@ export default class Util {
     return Promise.resolve(log);
   }
 
-  public getAcctHash(userpath: string) {
-    try {
-      return fs.readFileSync(`${userpath}/.securesign/auth`).toString();
-    } catch (error) {
-      return null;
-    }
-  }
-
   public parseCertificate(pem: string) {
-    return axios.post<Certificate>('https://certapi.libraryofcode.org/parse', pem);
+    return axios.post<Certificate>('https://certapi.libraryofcode.org/parse', pem)
+      .then((response) => response.data);
   }
 
   public upload(text: string, extension = 'txt') {
diff --git a/src/commands/createaccount.ts b/src/commands/createaccount.ts
index 91d5f25..40c1af7 100644
--- a/src/commands/createaccount.ts
+++ b/src/commands/createaccount.ts
@@ -1,5 +1,6 @@
 import { GuildMember, Message } from 'discord.js';
 import { Client, Command } from '../class';
+import { LINUX_USERNAME_REGEX } from '../class/AccountUtil';
 
 export default class CreateAccount extends Command {
   constructor(client: Client) {
@@ -32,7 +33,7 @@ export default class CreateAccount extends Command {
       if (checkAccount) return this.error(message.channel, 'Account already exists with this username.');
 
       if (!this.client.util.isValidEmail(args[1])) return this.error(message.channel, 'Invalid email address supplied.');
-      if (!/^[a-z][-a-z0-9]*$/.test(args[2])) return this.error(message.channel, 'Invalid username supplied.');
+      if (!LINUX_USERNAME_REGEX.test(args[2])) return this.error(message.channel, 'Invalid username supplied.');
 
       const confirmation = await this.loading(message.channel, 'Creating account...');
       const data = await this.client.util.accounts.createAccount({ userID: args[0], username: args[2], emailAddress: args[1] }, message.author.id);
diff --git a/src/commands/cwg_data.ts b/src/commands/cwg_data.ts
index 5435d46..e0cca7f 100644
--- a/src/commands/cwg_data.ts
+++ b/src/commands/cwg_data.ts
@@ -37,9 +37,9 @@ export default class CWG_Data extends Command {
         embed.addField('Account ID', domain.account.userID, true);
         embed.addField('Domain', domain.domain, true);
         embed.addField('Port', String(domain.port), true);
-        embed.addField('Certificate Issuer', cert.data.issuer.organization[0], true);
-        embed.addField('Certificate Subject', cert.data.issuer.commonName, true);
-        embed.addField('Certificate Expiration Date', moment(cert.data.notAfter).format('dddd, MMMM Do YYYY, h:mm:ss A'), true);
+        embed.addField('Certificate Issuer', cert.issuer.organization[0], true);
+        embed.addField('Certificate Subject', cert.issuer.commonName, true);
+        embed.addField('Certificate Expiration Date', moment(cert.notAfter).format('dddd, MMMM Do YYYY, h:mm:ss A'), true);
         embed.setFooter(this.client.user.username, this.client.user.avatarURL());
         embed.setTimestamp();
         return embed;
diff --git a/src/commands/index.ts b/src/commands/index.ts
index 85b7108..eaa87c7 100644
--- a/src/commands/index.ts
+++ b/src/commands/index.ts
@@ -28,6 +28,7 @@ export { default as systemd } from './systemd';
 export { default as tier } from './tier';
 export { default as unban } from './unban';
 export { default as unlock } from './unlock';
+export { default as usermod } from './usermod';
 export { default as users } from './users';
 export { default as warn } from './warn';
 export { default as whois } from './whois';
diff --git a/src/commands/lock.ts b/src/commands/lock.ts
index f3a2df7..7f2a827 100644
--- a/src/commands/lock.ts
+++ b/src/commands/lock.ts
@@ -12,7 +12,7 @@ export default class Lock extends Command {
     this.usage = `${this.client.config.prefix}lock [User Name | User ID/Mention] <Time> [Reason]`;
   }
 
-  public async run(message: Message, args: string[]) { // eslint-disable-line
+  public async run(message: Message, args: string[]) {
     try {
       if (!args.length) return this.client.commands.get('help').run(message, [this.name]);
       const account = await this.client.db.Account.findOne({ $or: [{ username: args[0] }, { userID: args[0].replace(/[<@!>]/gi, '') }] });
diff --git a/src/commands/usermod.ts b/src/commands/usermod.ts
new file mode 100644
index 0000000..1d9a1f4
--- /dev/null
+++ b/src/commands/usermod.ts
@@ -0,0 +1,75 @@
+import { Message } from 'discord.js';
+import { Client, Command } from '../class';
+import { LINUX_USERNAME_REGEX } from '../class/AccountUtil';
+
+export default class Usermod extends Command {
+  constructor(client: Client) {
+    super(client);
+    this.name = 'usermod';
+    this.description = 'Modifies properties of a user\'s cloud account';
+    this.permissions = { roles: ['662163685439045632', '701454780828221450'] };
+    this.enabled = true;
+  }
+
+  public async run(message: Message, args: string[]) {
+    if (!args.length) return this.client.commands.get('help').run(message, [this.name]);
+    const [, property, value] = args;
+
+    const account = await this.client.db.Account.findOne({ $or: [{ username: args[0] }, { userID: args[0] }] });
+    if (!account) return this.error(message.channel, 'Cannot find user.');
+
+    switch (property) {
+      case 'email': {
+        if (value === account.emailAddress) return this.error(message.channel, 'The new email address cannot be the same as the old one.');
+        if (await this.client.db.Account.exists({ emailAddress: value })) return this.error(message.channel, 'An account with this email address already exists.');
+        if (!this.client.util.isValidEmail(value)) return this.error(message.channel, 'The supplied email address is invalid.');
+
+        const modifyingPropertyResponse = await this.loading(message.channel, `Modifying \`${property}\` of \`${account.username}\`'s account...`);
+        await this.client.commands.get('notify')
+          .run(message, [account.username, ...(`Your email address has been changed from ${account.emailAddress} to ${value}.`.split(' '))]);
+        await account.updateOne({ emailAddress: value });
+
+        modifyingPropertyResponse.delete();
+        this.success(message.channel, `Successfully updated \`${account.username}\`'s email address.`);
+        break;
+      }
+
+      case 'username': {
+        if (value === account.username) return this.error(message.channel, 'The username cannot be the same as the old one.');
+        if (await this.client.db.Account.exists({ username: value })) return this.error(message.channel, 'An account with this username already exists.');
+
+        if (!LINUX_USERNAME_REGEX.test(value)) return this.error(message.channel, 'Please supply a valid username.');
+        if (value === 'root') return this.error(message.channel, 'This username is unavailable.');
+
+        const modifyingPropertyResponse = await this.loading(message.channel, `Modifying \`${property}\` of \`${account.username}\`'s account...`);
+        try {
+          await this.client.commands.get('lock')
+            .run(message, [account.username, ...(`Changing your username from \`${account.username}\` to \`${value}\`. DN/C`.split(' '))]);
+
+          await this.client.util.exec(`usermod -l ${value} ${account.username}`);
+          await this.client.util.exec(`usermod -d /home/${value} ${account.username}`);
+
+          await account.updateOne({
+            username: value,
+            homepath: `/home/${value}`,
+          });
+          await this.client.commands.get('unlock')
+            .run(message, [value, ...(`Your username has been successfully changed. Remember to use \`ssh ${value}@cloud.libraryofcode.org\` when logging in.`)]);
+        } catch (error) {
+          await this.client.commands.get('unlock')
+            .run(message, [account.username, ...('Your username change was unsuccessful. Please contact a Technician for more details.')]);
+          this.error(message.channel, 'Failed to modify username.');
+          return this.client.util.handleError(error);
+        }
+
+        modifyingPropertyResponse.delete();
+        this.success(message.channel, 'Successfully modified username.');
+        break;
+      }
+
+      default:
+        this.error(message.channel, 'Please specify a valid option.');
+        break;
+    }
+  }
+}