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sandervanvugt

RHCSA day2 sept21

sandervanvugt
Sep 8th, 2021
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  1. resize2fs 1.45.6 (20-Mar-2020)
  2. Filesystem at /dev/mapper/vgdata-lvdata is mounted on /lvdata; on-line resizing required
  3. old_desc_blocks = 1, new_desc_blocks = 1
  4. The filesystem on /dev/mapper/vgdata-lvdata is now 392192 (4k) blocks long.
  5.  
  6. [root@rhcsa ~]# df -h
  7. Filesystem Size Used Avail Use% Mounted on
  8. devtmpfs 1.8G 0 1.8G 0% /dev
  9. tmpfs 1.9G 0 1.9G 0% /dev/shm
  10. tmpfs 1.9G 19M 1.8G 1% /run
  11. tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
  12. /dev/mapper/rhel-root 17G 14G 3.8G 79% /
  13. /dev/nvme0n1p3 5.0G 68M 5.0G 2% /newfs
  14. /dev/nvme0n1p5 2.0G 47M 2.0G 3% /xfs
  15. /dev/nvme0n1p6 4.9G 20M 4.6G 1% /ext4
  16. /dev/nvme0n1p1 1014M 240M 775M 24% /boot
  17. tmpfs 371M 1.2M 370M 1% /run/user/42
  18. tmpfs 371M 4.6M 367M 2% /run/user/1000
  19. /dev/sr0 8.9G 8.9G 0 100% /run/media/student/RHEL-8-3-0-BaseOS-x86_64
  20. /dev/loop0 8.9G 8.9G 0 100% /repo
  21. /dev/mapper/vgdata-lvdata 1.5G 3.0M 1.4G 1% /lvdata
  22. [root@rhcsa ~]# lvextend -l +100%FREE /dev/vgdata/lvdata
  23. Size of logical volume vgdata/lvdata changed from <1.50 GiB (383 extents) to 1.99 GiB (510 extents).
  24. Logical volume vgdata/lvdata successfully resized.
  25. [root@rhcsa ~]# df -h
  26. Filesystem Size Used Avail Use% Mounted on
  27. devtmpfs 1.8G 0 1.8G 0% /dev
  28. tmpfs 1.9G 0 1.9G 0% /dev/shm
  29. tmpfs 1.9G 19M 1.8G 1% /run
  30. tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
  31. /dev/mapper/rhel-root 17G 14G 3.8G 79% /
  32. /dev/nvme0n1p3 5.0G 68M 5.0G 2% /newfs
  33. /dev/nvme0n1p5 2.0G 47M 2.0G 3% /xfs
  34. /dev/nvme0n1p6 4.9G 20M 4.6G 1% /ext4
  35. /dev/nvme0n1p1 1014M 240M 775M 24% /boot
  36. tmpfs 371M 1.2M 370M 1% /run/user/42
  37. tmpfs 371M 4.6M 367M 2% /run/user/1000
  38. /dev/sr0 8.9G 8.9G 0 100% /run/media/student/RHEL-8-3-0-BaseOS-x86_64
  39. /dev/loop0 8.9G 8.9G 0 100% /repo
  40. /dev/mapper/vgdata-lvdata 1.5G 3.0M 1.4G 1% /lvdata
  41. [root@rhcsa ~]#
  42. [root@rhcsa ~]# res
  43. rescan-scsi-bus.sh resize2fs resizepart resolvectl restorecon_xattr
  44. reset resizecons resolvconf restorecon
  45. [root@rhcsa ~]# resize2fs
  46. anaconda-ks.cfg .bash_logout .cache/ .cshrc .tcshrc
  47. archive.tgz .bash_profile .config/ .dbus/ userfiles/
  48. .bash_history .bashrc countdown initial-setup-ks.cfg .viminfo
  49. [root@rhcsa ~]# resize2fs --help
  50. resize2fs 1.45.6 (20-Mar-2020)
  51. resize2fs: invalid option -- '-'
  52. Usage: resize2fs [-d debug_flags] [-f] [-F] [-M] [-P] [-p] device [-b|-s|new_size] [-S RAID-stride] [-z undo_file]
  53.  
  54. [root@rhcsa ~]# resize2fs /dev/vgdata/lvdata
  55. resize2fs 1.45.6 (20-Mar-2020)
  56. Filesystem at /dev/vgdata/lvdata is mounted on /lvdata; on-line resizing required
  57. old_desc_blocks = 1, new_desc_blocks = 1
  58. The filesystem on /dev/vgdata/lvdata is now 522240 (4k) blocks long.
  59.  
  60. [root@rhcsa ~]# lvreduce -r -l -1G /dev/vgdata/lvdata
  61. Invalid argument for --extents: -1G
  62. Error during parsing of command line.
  63. [root@rhcsa ~]# lvreduce -r -L -1G /dev/vgdata/lvdata
  64. Do you want to unmount "/lvdata" ? [Y|n] y
  65. fsck from util-linux 2.32.1
  66. /dev/mapper/vgdata-lvdata: 11/130560 files (0.0% non-contiguous), 13068/522240 blocks
  67. resize2fs 1.45.6 (20-Mar-2020)
  68. Resizing the filesystem on /dev/mapper/vgdata-lvdata to 260096 (4k) blocks.
  69. The filesystem on /dev/mapper/vgdata-lvdata is now 260096 (4k) blocks long.
  70.  
  71. Size of logical volume vgdata/lvdata changed from 1.99 GiB (510 extents) to 1016.00 MiB (254 extents).
  72. Logical volume vgdata/lvdata successfully resized.
  73. [root@rhcsa ~]# xfs
  74. xfs_admin xfs_db xfs_freeze xfs_info xfs_logprint xfs_mkfile xfs_repair xfs_spaceman
  75. xfs_bmap xfsdump xfs_fsr xfsinvutil xfs_mdrestore xfs_ncheck xfsrestore
  76. xfs_copy xfs_estimate xfs_growfs xfs_io xfs_metadump xfs_quota xfs_rtcp
  77. [root@rhcsa ~]# xfs
  78. [root@rhcsa ~]# xfs
  79. xfs_admin xfs_db xfs_freeze xfs_info xfs_logprint xfs_mkfile xfs_repair xfs_spaceman
  80. xfs_bmap xfsdump xfs_fsr xfsinvutil xfs_mdrestore xfs_ncheck xfsrestore
  81. xfs_copy xfs_estimate xfs_growfs xfs_io xfs_metadump xfs_quota xfs_rtcp
  82. [root@rhcsa ~]# history
  83. 1 vim countdown
  84. 2 chmod +x countdown
  85. 3 ./countdown 9
  86. 4 tar cvzf /root/archive.tgz /etc
  87. 5 file archive.tgz
  88. 6 tar tvf archive.tgz
  89. 7 tar xvf archive.tgz -C /tmp
  90. 8 grep -v "^$" /etc/dnsmasq.conf | sort > /var/tmp/dnslines.txt
  91. 9 history
  92. 10 useradd linda
  93. 11 find / -user linda -type f -exec cp -pr {} /root/userfiles \;
  94. 12 ls -l /root/userfiles
  95. 13 less /root/userfiles
  96. 14 rm /root/userfiles ; mkdir /root/userfiles ; find / -user linda -type f -exec cp -pr {} /root/userfiles/ \;
  97. 15 ls /root/userfiles/
  98. 16 ls /root/userfiles/ -l
  99. 17 rm /root/userfiles/linda
  100. 18 find / -user linda -exec cp -pr {} /root/userfiles/ \;
  101. 19 ls -l /root/userfiles/
  102. 20 ls -l /root/userfiles/ -a
  103. 21 ls -la /home/linda
  104. 22 ls -l /var/spool/
  105. 23 find / -user linda
  106. 24 exit
  107. 25 usermod -aG wheel student
  108. 26 id student
  109. 27 visudo
  110. 28 vim countdown
  111. 29 chmod +x countdown
  112. 30 ./countdown 12
  113. 31 less /etc/passwd
  114. 32 su - linda
  115. 33 vim /etc/login.defs
  116. 34 vim /etc/skel/
  117. 35 cd /etc/skel/
  118. 36 ls
  119. 37 ls -a
  120. 38 touch myfile
  121. 39 cd
  122. 40 groupadd sales
  123. 41 useradd --help | less
  124. 42 useradd -G sales bob
  125. 43 id bob
  126. 44 passwd --help
  127. 45 useradd kees -x 9090
  128. 46 useradd kees
  129. 47 passwd -x 9090 kees
  130. 48 passwd --help
  131. 49 passwd -S kees
  132. 50 vim /etc/shadow
  133. 51 useradd -u 1234 whoever
  134. 52 grep whoever /etc/passwd
  135. 53 cat /etc/shadow
  136. 54 passwd whoever
  137. 55 cat /etc/shadow
  138. 56 passwd -l whoever
  139. 57 cat /etc/shadow
  140. 58 echo password | passwd --stdin whoever
  141. 59 for i in bob linda whoever student; do echo password | passwd --stdin $i; done
  142. 60 chage linda
  143. 61 ls -l
  144. 62 mkdir /data/sales
  145. 63 mkdir -p /data/sales
  146. 64 mkdir -p /data/account
  147. 65 cd /data
  148. 66 ls -l
  149. 67 chgrp account account
  150. 68 groupadd account
  151. 69 chgrp account account
  152. 70 chgrp sales sales
  153. 71 ls -l
  154. 72 chmod 770 *
  155. 73 ls -l
  156. 74 id linda
  157. 75 usermod -aG sales linda
  158. 76 grep sales /etc/group
  159. 77 id linda
  160. 78 grep linda /etc/passwd
  161. 79 grep sales /etc/passwd
  162. 80 grep sales /etc/group
  163. 81 grep wheel /etc/group
  164. 82 su - linda
  165. 83 su - bob
  166. 84 cd /home/linda
  167. 85 touch root1
  168. 86 touch root2
  169. 87 su - linda
  170. 88 pwd
  171. 89 touch root3
  172. 90 su - linda
  173. 91 cd
  174. 92 ./countdown 12
  175. 93 cd /home/linda
  176. 94 vim playme
  177. 95 chmod +x playme
  178. 96 su - linda
  179. 97 chmod u+s playme
  180. 98 ls -l
  181. 99 find / -perm /4000 2>/dev/null
  182. 100 ls -l /usr/bin/passwd
  183. 101 ls -l /etc/shadow
  184. 102 su - linda
  185. 103 chmod g+s /data/sales
  186. 104 ls -ld /data/sales/
  187. 105 cd /data/sales
  188. 106 touch wortel
  189. 107 ls -l
  190. 108 su - linda
  191. 109 chmod +t /data/sales
  192. 110 su - bob
  193. 111 ls -ld /tmp
  194. 112 cd
  195. 113 ./countdown 1
  196. 114 lsblk
  197. 115 ./countdown 12
  198. 116 lsblk
  199. 117 poweroff
  200. 118 lsblk
  201. 119 fdisk /dev/nvme0n1
  202. 120 gdisk /dev/nvme0n1
  203. 121 fdisk /dev/nvme0n1
  204. 122 lsblk
  205. 123 mkfs.xfs /dev/nvme0n1p3
  206. 124 mkdir /newfs
  207. 125 vim /etc/fstab
  208. 126 mount -a
  209. 127 mount
  210. 128 reboot
  211. 129 fdisk /dev/nvme0n1p1
  212. 130 fdisk /dev/nvme0n1
  213. 131 reboot
  214. 132 fdisk -l
  215. 133 lsblk
  216. 134 mkdir /xfs
  217. 135 mkdir /ext4
  218. 136 mkfs.xfs /dev/nvme0n1p5
  219. 137 mkfs.ext4 /dev/nvme0n1p6
  220. 138 vim /etc/fstab
  221. 139 mount -a
  222. 140 vim /etc/fstab
  223. 141 mount -a
  224. 142 cd /xfs
  225. 143 touch sda5file
  226. 144 cd /ext4
  227. 145 touch ext4file
  228. 146 cd /
  229. 147 vim /etc/fstab
  230. 148 umount /xfs
  231. 149 fdisk /dev/nvme0n1
  232. 150 reboot
  233. 151 vim /etc/fstab
  234. 152 reboot
  235. 153 history
  236. 154 vim /etc/fstab
  237. 155 reboot
  238. 156 journalctl -xb
  239. 157 lsblk
  240. 158 blkid
  241. 159 tune2fs --help
  242. 160 tune2fs -L cow /dev/nvme0n1p5
  243. 161 tune2fs -l /dev/nvwm0n1p5
  244. 162 tune2fs -l /dev/nvme0n1p5
  245. 163 tune2fs -l /dev/nvme0n1p5 | lss
  246. 164 tune2fs -l /dev/nvme0n1p5 | less
  247. 165 vim /etc/fstab
  248. 166 reboot
  249. 167 mount
  250. 168 mount | grep '^/'
  251. 169 df -h
  252. 170 man tune2fs
  253. 171 fdisk /dev/nvme0n1
  254. 172 lsblk
  255. 173 mount /dev/nvme0n1p6 /xfs
  256. 174 cd /xfs
  257. 175 ls
  258. 176 xfs_admin --help
  259. 177 xfs_admin -L goat /dev/nvme0n1p6
  260. 178 umount /xfs
  261. 179 cd /
  262. 180 umount /xfs
  263. 181 xfs_admin -L goat /dev/nvme0n1p6
  264. 182 blkid
  265. 183 blkid | grep n1p6
  266. 184 blkid | grep n1p6 | awk '{ print $3 }'
  267. 185 blkid | grep n1p6 | awk '{ print $3 }' >> /etc/fstab
  268. 186 vim /etc/fstab
  269. 187 mount -a
  270. 188 reboot
  271. 189 df
  272. 190 fdisk /dev/nvme0n1
  273. 191 vim /etc/default/grub
  274. 192 grub2-mkconfig -o /boot/grub2/grub.cfg
  275. 193 reboot
  276. 194 lsblk
  277. 195 history
  278. 196 groupadd students
  279. 197 groupadd profs
  280. 198 vim /etc/login.defs
  281. 199 usermod -aG students linda
  282. 200 id linda
  283. 201 useradd -G students lisa
  284. 202 useradd -G profs anna
  285. 203 useradd -G profs anouk
  286. 204 mkdir -p /data/profs /data/students
  287. 205 cd /data
  288. 206 ls -k
  289. 207 ls -l
  290. 208 chown anna:profs profs
  291. 209 chown anna:students students
  292. 210 chmod 3770 profs
  293. 211 chmod 3770 students
  294. 212 ls -l
  295. 213 vim /etc/fstab
  296. 214 cd
  297. 215 ./countdown 5
  298. 216 cd /data
  299. 217 ls -l
  300. 218 getfacl sales
  301. 219 ls -l sales/
  302. 220 setfacl -R -m g:account:rx sales/
  303. 221 ls -l sales/
  304. 222 man setfacl
  305. 223 setfacl -R -x g:account sales/
  306. 224 ls -l sales/
  307. 225 setfacl -R -m g:account:rX sales/
  308. 226 ls -l sales/
  309. 227 su - linda
  310. 228 setfacl -m d:g:account:rx sales
  311. 229 getfacl sales
  312. 230 su - linda
  313. 231 getfacl sales/default
  314. 232 history
  315. 233 getfacl students/
  316. 234 ls -l *
  317. 235 ls -ld *
  318. 236 setfacl -R -m:profs:rX students
  319. 237 setfacl -R -m g:profs:rX students
  320. 238 setfacl -R -m d:g:profs:rx students
  321. 239 getfacls students/
  322. 240 getfacl students/
  323. 241 df -h
  324. 242 cd
  325. 243 dd if=/dev/sr0 of=/rhel83.iso bs=1M
  326. 244 yum repolist
  327. 245 yum install -y nmap
  328. 246 mkdir /repo
  329. 247 vim /etc/fstab
  330. 248 ls /repo
  331. 249 mount -a
  332. 250 ls /repo
  333. 251 vim /etc/fstab
  334. 252 yum repolist
  335. 253 cd /etc/yum.repos.d/
  336. 254 ls
  337. 255 cat redhat.repo
  338. 256 cd /repo
  339. 257 ls
  340. 258 grep repo /etc/fstab
  341. 259 ls AppStream/
  342. 260 ls BaseOS/
  343. 261 ls BaseOS/Packages/
  344. 262 ls BaseOS/repodata/
  345. 263 cd -
  346. 264 vim appstream.repo
  347. 265 vim base.repo
  348. 266 yum repolist
  349. 267 yum install nmap
  350. 268 yum provides */seinfo
  351. 269 seinfo
  352. 270 cd
  353. 271 yum module list
  354. 272 yum module list | less
  355. 273 yum module provides httpd
  356. 274 yum module info postgresql
  357. 275 yum module info --profile postgresql
  358. 276 yum module list postgresql
  359. 277 yum module install postgresql:9.6
  360. 278 yum module install postgresql:9.6/devel
  361. 279 yum module enable postgresql:9.6
  362. 280 ./countdown 12
  363. 281 ip
  364. 282 ip addr
  365. 283 ip a
  366. 284 ip a a dev ens160 10.10.0.10/24
  367. 285 ip a
  368. 286 ping 10.10.0.10
  369. 287 ifconfig
  370. 288 ifconfig -a
  371. 289 ifconfig /all
  372. 290 man ifconfig
  373. 291 ip
  374. 292 ip route show
  375. 293 ip route add 1.0.0.0/8 via 192.168.29.100
  376. 294 systemctl status NetworkManager
  377. 295 nmtui
  378. 296 ip a
  379. 297 cd /etc/sysconfig/network-scripts/
  380. 298 ls
  381. 299 vim ifcfg-ens160
  382. 300 ip link show
  383. 301 man ifconfig
  384. 302 ip -s link show
  385. 303 systemctl status tuned
  386. 304 tuned-adm list
  387. 305 tuned-adm profile latency-performance
  388. 306 tuned-adm active
  389. 307 ls /usr/lib/tuned/
  390. 308 ls /etc/tuned/
  391. 309 mkdir /etc/tuned/sander
  392. 310 cp /usr/lib/tuned/latency-performance/* /etc/tuned/sander/
  393. 311 cd /etc/tuned/sander
  394. 312 ls
  395. 313 vim tuned.conf
  396. 314 sysctl -a
  397. 315 sysctl -a | wc
  398. 316 tuned-adm list
  399. 317 su - linda
  400. 318 cd
  401. 319 cp countdown /usr/bin
  402. 320 countdown 12
  403. 321 fdisk /dev/nvme0n1
  404. 322 cat /proc/partitions
  405. 323 lsblk
  406. 324 pvcreate --help
  407. 325 pvcreate /dev/nvme0n1p7
  408. 326 pvs
  409. 327 vgcreate --help | less
  410. 328 vgcreate vgdata -s 4m /dev/nvme0n1p7
  411. 329 vgs
  412. 330 vgdisplay rhel | less
  413. 331 echo $(( 4863 * 4 ))
  414. 332 echo $(( 19452 / 1024 ))
  415. 333 lvcreate --help | less
  416. 334 lvcreate -L 1G -n lvdata vgdata
  417. 335 lvcreate -l 255 -n lvdata vgdata
  418. 336 mkfs.ext4 /dev/vgdata/lvdata
  419. 337 mkdir /lvdata
  420. 338 vim /etc/fstab
  421. 339 mount -a
  422. 340 mount
  423. 341 ls -l /dev/vgdata/lvdata /dev/mapper/vgdata-lvdata
  424. 342 pvs
  425. 343 xxd /dev/nvme0n1p7 | less
  426. 344 xxd /dev/nvme0n1 | less
  427. 345 df -h
  428. 346 lvextend -r -l +50%FREE /dev/vgdata/lvdata
  429. 347 vgs
  430. 348 vgextend --help
  431. 349 vgextend vgdata /dev/nvme0n1p8
  432. 350 vgs
  433. 351 lvextend -r -l +50%FREE /dev/vgdata/lvdata
  434. 352 df -h
  435. 353 lvextend -l +100%FREE /dev/vgdata/lvdata
  436. 354 df -h
  437. 355 resize2fs --help
  438. 356 resize2fs /dev/vgdata/lvdata
  439. 357 lvreduce -r -l -1G /dev/vgdata/lvdata
  440. 358 lvreduce -r -L -1G /dev/vgdata/lvdata
  441. 359 history
  442.  
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