Question 1mediummulti select
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Refer to the exhibit. $ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 232.9G 0 disk ├─sda1 8:1 0 487M 0 part /boot ├─sda2 8:2 0 1K 0 part └─sda5 8:5 0 232.4G 0 part ├─vg-root (dm-0) 252:0 0 50G 0 lvm / └─vg-home (dm-1) 252:1 0 100G 0 lvm /home sdb 8:16 0 232.9G 0 disk └─sdb1 8:17 0 232.9G 0 part └─vg-data (dm-2) 252:2 0 200G 0 lvm /data
Refer to the exhibit. $ cat /etc/fstab # /etc/fstab: static file system information. UUID=abc123 / ext4 defaults 0 1 UUID=def456 /boot ext4 defaults 0 2 UUID=ghi789 none swap sw 0 0 /dev/sdb1 /mnt/data ext4 defaults 0 0 //192.168.1.100/share /mnt/nfs nfs defaults 0 0
Refer to the exhibit. $ df -h /var/log Filesystem Size Used Avail Use% Mounted on /dev/sda3 20G 18G 1.5G 93% /var/log $ ls -la /var/log/syslog -rw-r----- 1 syslog adm 2048000000 Feb 20 10:30 /var/log/syslog
Drag steps to the numbered slots on the right, or tap a step then tap a slot.
Drag steps to the numbered slots on the right, or tap a step then tap a slot.
Drag a concept onto its matching description — or click a concept then click the description.
Journaling file system, default on many Linux distros
High-performance 64-bit journaling file system
Copy-on-write file system with snapshots
Used for virtual memory paging
Compatible with Windows FAT32
Drag a concept onto its matching description — or click a concept then click the description.
Test network connectivity to a host
Display network connections, routing tables, etc.
Capture and analyze network packets
Query DNS for domain name or IP
Configure network interfaces and routing
Exhibit: Output of `lsblk` NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 50G 0 disk ├─sda1 8:1 0 500M 0 part /boot ├─sda2 8:2 0 49.5G 0 part / ├─sda3 8:3 0 2G 0 part [SWAP] sdb 8:16 0 100G 0 disk └─sdb1 8:17 0 100G 0 part /data
Exhibit: /etc/fstab content: UUID=abc123 / ext4 defaults 1 1 UUID=def456 /boot ext3 defaults 1 2 UUID=ghi789 none swap sw 0 0 /dev/cdrom /mnt/cdrom auto noauto,user 0 0
Exhibit: Output of `df -h` Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_root-lv_root 20G 18G 1.1G 95% / /dev/sda1 487M 112M 348M 25% /boot tmpfs 1.9G 0 1.9G 0% /dev/shm /dev/mapper/vg_data-lv_data 50G 30G 18G 63% /data
$ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 256G 0 disk ├─sda1 8:1 0 512M 0 part /boot/efi ├─sda2 8:2 0 100G 0 part / ├─sda3 8:3 0 150G 0 part /data
$ cat /etc/fstab # <file system> <mount point> <type> <options> <dump> <pass> /dev/sda1 /boot/efi vfat umask=0077 0 1 /dev/sda2 / ext4 errors=remount-ro 0 1 /dev/sda3 /data ext4 defaults 0 2 /dev/sdb1 /mnt/backup ext4 defaults 0 0
$ mount tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noexec,relatime)
Device Boot Start End Sectors Size Id Type /dev/sda1 * 2048 2099199 2097152 1G 83 Linux /dev/sda2 2099200 41943039 39843840 19G 83 Linux /dev/sda3 41943040 83886079 41943040 20G 83 Linux
EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null) EXT4-fs error (device sda1): ext4_find_entry: deleted inode referenced: inode #12345 EXT4-fs (sda1): remounting filesystem read-only
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime) proc on /proc type proc (rw,nosuid,nodev,noexec,relatime) udev on /dev type devtmpfs (rw,nosuid,relatime,size=100m) devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620)
--- /dev/sda1 on / type ext4 (rw,relatime,errors=remount-ro) /dev/sda2 on /var type ext4 (rw,relatime) /dev/sdb1 on /mnt/backup type ext4 (rw,relatime) /dev/sdc1 on /media/usb type vfat (rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro) tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=10240k) ---
--- $ mount -o remount,ro /mnt mount: /mnt: mount point not mounted or bad option. ---
Refer to the exhibit. # blkid /dev/sdc1 /dev/sdc1: UUID="1234-ABCD" TYPE="vfat" # cat /etc/fstab | grep sdc1 UUID="5678-EFGH" /media/usb vfat defaults 0 0
$ mount | grep /dev/sdb1 /dev/sdb1 on /mnt/data type ext4 (rw,noexec,nosuid,nodev) $ ls -l /mnt/data/script.sh -rwxr-xr-x 1 root root 100 Jan 1 00:00 /mnt/data/script.sh $ /mnt/data/script.sh bash: /mnt/data/script.sh: Permission denied
# /etc/fstab /dev/sda1 /boot ext4 defaults 1 2 /dev/sda2 / ext4 defaults 0 1 /dev/sda3 /home ext4 defaults 0 2 192.168.1.100:/export /mnt/nfs nfs defaults,_netdev 0 0 # mount -a output: mount: /mnt/nfs: can't read superblock
$ lsblk -o NAME,FSTYPE,LABEL,MOUNTPOINT NAME FSTYPE LABEL MOUNTPOINT sda ├─sda1 ext4 boot /boot ├─sda2 ext4 root / ├─sda3 swap swap [SWAP] └─sda4 ext4 data /mnt/data sdb └─sdb1 ext4 backup /mnt/backup $ blkid /dev/sda4 /dev/sda4: UUID="abc-123" TYPE="ext4" LABEL="data"
# /etc/fstab UUID=abc123 / ext4 defaults 0 1 UUID=def456 /home ext4 defaults 0 2 UUID=ghi789 /var/log ext4 defaults 0 2 # /etc/fstab entry for swap UUID=jkl012 none swap sw 0 0 # Backup fstab entry for /data /dev/sdc1 /data ext4 defaults 0 2
$ lsblk -o NAME,FSTYPE,SIZE,MOUNTPOINT NAME FSTYPE SIZE MOUNTPOINT sda 20G ├─sda1 ext4 10G / ├─sda2 swap 2G [SWAP] └─sda3 ext4 8G /home sdb 10G └─sdb1 ext4 10G /mnt/backup $ df -h Filesystem Size Used Avail Use% Mounted on /dev/sda1 10G 9.5G 500M 95% / /dev/sda3 8G 2G 5.9G 26% /home /dev/sdb1 10G 1G 9G 10% /mnt/backup
$ ls -la /usr/local/bin/myapp -rwsr-xr-x 1 root root 12345 Jan 1 00:00 /usr/local/bin/myapp $ sudo -u user1 /usr/local/bin/myapp Error: Permission denied $ id user1 uid=1001(user1) gid=1001(user1) groups=1001(user1) $ getfacl /usr/local/bin/myapp # file: usr/local/bin/myapp # owner: root # group: root user::rwx group::r-x other::r-x
$ sudo fdisk -l /dev/sdb Disk /dev/sdb: 10 GiB, 10737418240 bytes, 20971520 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Device Start End Sectors Size Type /dev/sdb1 2048 20971519 20969472 10G Linux filesystem $ sudo blkid /dev/sdb1 /dev/sdb1: UUID="12345678-1234-1234-1234-123456789abc" TYPE="ext4" PARTUUID="abcdef01-02"