Linux Essentials Optimization Supplement

1.1 Garbled Reason:
? The character set of Linux differs from the character set of a remote connection
1.2 Troubleshooting
?
1.3 How to fix (how to modify the Linux character set)

? View the garbled structure map URL; https://www.processon.com/view/link/59e978b0e4b0c86d400de71c
2nd Chapter Linux Directory Structure-Features
2.1 Directory structure features
? Upside down tree-like structure everything starts from the root.
? Linux each directory can mount a different device (disk)
? All Linux devices (disk discs) are not mounted and cannot be used
? Linux below all the devices are not directly used by default, to create a portal to the device, import = = = mount point = = Directory (already exists)
? mount/dev/cdrom/mnt/
?
2.2 Enter Command/dev/cdrom "Insert Disc"
[Email protected] ~]#/dev/cdrom
-bash:/dev/cdrom:permission denied
2.3 Query Command Ls–l/dev/cdrom "Enter Linux Disc file"
[Email protected] ~]# ls-l/dev/cdrom
lrwxrwxrwx. 1 root root 3 Jul 16:31/dev/cdrom-sr0
2.4 Mount Mount Command "Create an entry for the disc (already exists)"
[Email protected] ~]# mount/dev/cdrom/mnt/
Mount:block Device/dev/sr0 is write-protected, mounting read-only
Mount:/dev/sr0 already mounted or/mnt/busy
Mount:according to mTAB,/dev/sr0 is already mounted on/mnt
2.4.1 about the ls/mnt/packages/command
2.5 Development of the catalogue
? 1th HDD Storage System data/
? 2nd HDD holds user's own data/usr
?
2.6 FHS Directory hierarchy standard (/and/usr per directory role)
[Email protected]/oldboy]# ls-ld/tmp//usr/tmp//bin//usr/bin//sbin//usr/sbin/
Dr-xr-xr-x. 2 root root 4096 Jul 19:43/bin/
Dr-xr-xr-x. 2 root root 12288 Jul 19:43/sbin/
DRWXRWXRWT. 4 root root 4096 Jul 21:42/tmp/
Dr-xr-xr-x. 2 root root 24576 Jul 19:43/usr/bin/
Dr-xr-xr-x. 2 root root 12288 Jul 19:43/usr/sbin/
DRWXRWXRWT. 2 root root 4096 Jul 18:25/usr/tmp/
3rd Chapter root under the directory structure

? View URL: Https://www.processon.com/view/link/5a6a9944e4b0a92b467f03b0
4th Chapter/etc/usr/var/proc Introduction to the root of the
4.1/ Introduction to Proc
4.1.1 Viewing CPU information
? command:/proc/cpuinfo
? lscpu
4.1.2 Querying memory Information
/proc/meminfo Memory info Information
[[ Email protected] ~]# cat/proc/meminfo
memtotal:1906256 KB
memfree:1722092 KB
buffers:25796 KB
cached:52816 KB

[[email protected] ~]# FREE–H display memory information human identifiable
Total used free shared buffers Cached
mem:1.8g 180M 1.6G 224K 25M 51M
-/+ buffers/cache:103m 1.7G
swap:767m 0B 767M
4.1.3 Viewing mount Information
[Email protected] ~]# column-t/proc/mounts
Rootfs/rootfs RW 0 0
PROC/PROC proc Rw,relatime 0 0
Sysfs/sys Sysfs rw,relatime 0 0
Devtmpfs/dev Devtmpfs rw,relatime,size=938496k,nr_inodes=234624,mode=755 0 0
Devpts/dev/pts devpts rw,relatime,gid=5,mode=620,ptmxmode=000 0 0
Tmpfs/dev/shm Tmpfs rw,relatime 0 0
/DEV/SDA3/EXT4 rw,relatime,barrier=1,data=ordered 0 0
/proc/bus/usb/proc/bus/usb Usbfs rw,relatime 0 0
/dev/sda1/boot ext4 rw,relatime,barrier=1,data=ordered 0 0
None/proc/sys/fs/binfmt_misc binfmt_misc rw,relatime 0 0.
Cat/proc/mounts This can also be queried

Linux Essentials Optimization Supplement