Lab Number 1 Week 1

# Lab Number 1 Week 1
Number 1 - Login 
ajaybodla@ajays-air ~ % ssh cs45aa15@209.129.148.10
cs45aa15@209.129.148.10's password: 
Last login: Thu Feb 11 21:22:17 2021 from c-73-222-250-13.hsd1.ca.comcast.net

Number 2 - ID
[cs45aa15@mc-redhat01 ~]$ id
uid=1015(cs45aa15) gid=1015(cs45aa15) groups=1015(cs45aa15) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023

Number 3 - id -r vs id -u
[cs45aa15@mc-redhat01 ~]$ id -r
id: cannot print only names or real IDs in default format
[cs45aa15@mc-redhat01 ~]$ id -u
1015

id - r prints the real id instead of numbers while id -u only prints the effective user ID

Number 4 - who
[cs45aa15@mc-redhat01 ~]$ who
ply      :0           2021-01-30 06:52 (:0)
cs45aa24 pts/1        2021-02-11 22:59 (45-23-139-0.lightspeed.sntcca.sbcglobal.net)
cs45aa26 pts/2        2021-02-11 18:50 (c-71-204-169-222.hsd1.ca.comcast.net)
cs45aa32 pts/3        2021-02-11 23:14 (c-73-158-55-75.hsd1.ca.comcast.net)
cs45aa24 pts/4        2021-02-11 23:27 (45-23-139-0.lightspeed.sntcca.sbcglobal.net)
cs45aa15 pts/5        2021-02-11 23:27 (c-73-222-250-13.hsd1.ca.comcast.net)
ply      pts/0        2021-01-30 06:52 (:0)

Number 5 - tty
[cs45aa15@mc-redhat01 ~]$ tty
/dev/pts/5

Number 6 - w
[cs45aa15@mc-redhat01 ~]$ w
 23:34:20 up 13 days,  9:39, 10 users,  load average: 0.00, 0.03, 0.05
USER     TTY      FROM             LOGIN@   IDLE   JCPU   PCPU WHAT
ply      :0       :0               30Jan21 ?xdm?   1:48m  3.12s /usr/libexec/gnome-session-binary --session gnome-classic
cs45aa24 pts/1    45-23-139-0.ligh 22:59   15:00   0.05s  0.00s less -s
cs45aa26 pts/2    c-71-204-169-222 18:50    3:29m  0.05s  0.05s -bash
cs45aa32 pts/3    c-73-158-55-75.h 23:14   44.00s  0.05s  0.05s -bash
cs45aa24 pts/4    45-23-139-0.ligh 23:27   12.00s  0.05s  0.05s -bash
cs45aa15 pts/5    c-73-222-250-13. 23:27    4.00s  0.07s  0.03s w
ply      pts/0    :0               30Jan21 12days  0.15s  1.22s /usr/libexec/gnome-terminal-server

Number 7 - man w
[cs45aa15@mc-redhat01 ~]$ man w
Shows man page for w command

Number 8 - info man
[cs45aa15@mc-redhat01 ~]$ info man
Shows info page for man

Number 9 - hostname
[cs45aa15@mc-redhat01 ~]$ hostname
mc-redhat01


Number 10 - hostname--help
[cs45aa15@mc-redhat01 ~]$ hostname --help
Usage: hostname [-b] {hostname|-F file}         set host name (from file)
       hostname [-a|-A|-d|-f|-i|-I|-s|-y]       display formatted name
       hostname                                 display host name

       {yp,nis,}domainname {nisdomain|-F file}  set NIS domain name (from file)
       {yp,nis,}domainname                      display NIS domain name

       dnsdomainname                            display dns domain name

       hostname -V|--version|-h|--help          print info and exit

Program name:
       {yp,nis,}domainname=hostname -y
       dnsdomainname=hostname -d

Program options:
    -a, --alias            alias names
    -A, --all-fqdns        all long host names (FQDNs)
    -b, --boot             set default hostname if none available
    -d, --domain           DNS domain name
    -f, --fqdn, --long     long host name (FQDN)
    -F, --file             read host name or NIS domain name from given file
    -i, --ip-address       addresses for the host name
    -I, --all-ip-addresses all addresses for the host
    -s, --short            short host name
    -y, --yp, --nis        NIS/YP domain name

Description:
   This command can get or set the host name or the NIS domain name. You can
   also get the DNS domain or the FQDN (fully qualified domain name).
   Unless you are using bind or NIS for host lookups you can change the
   FQDN (Fully Qualified Domain Name) and the DNS domain name (which is
   part of the FQDN) in the /etc/hosts file.

> hostname -i
> Long hostname

Number 11 - man-k printf
[cs45aa15@mc-redhat01 ~]$ man -k printf
asprintf (3)         - print to allocated string
dprintf (3)          - print to a file descriptor
fprintf (3)          - formatted output conversion
fprintf (3p)         - print formatted output
fwprintf (3)         - formatted wide-character output conversion
fwprintf (3p)        - print formatted wide-character output
ldns_buffer_printf (3) - (unknown subject)
printf (1)           - format and print data
printf (1p)          - write formatted output
printf (3)           - formatted output conversion
printf (3p)          - print formatted output
snprintf (3)         - formatted output conversion
snprintf (3p)        - print formatted output
sprintf (3)          - formatted output conversion
sprintf (3p)         - print formatted output
swprintf (3)         - formatted wide-character output conversion
swprintf (3p)        - print formatted wide-character output
vasprintf (3)        - print to allocated string
vdprintf (3)         - print to a file descriptor
vfprintf (3)         - formatted output conversion
vfprintf (3p)        - format output of a stdarg argument list
vfwprintf (3)        - formatted wide-character output conversion
vfwprintf (3p)       - wide-character formatted output of a stdarg argument list
vprintf (3)          - formatted output conversion
vprintf (3p)         - format output of a stdarg argument list
vsnprintf (3)        - formatted output conversion
vsnprintf (3p)       - format output of a stdarg argument list
vsprintf (3)         - formatted output conversion
vsprintf (3p)        - format output of a stdarg argument list
vswprintf (3)        - formatted wide-character output conversion
vswprintf (3p)       - wide-character formatted output of a stdarg argument list
vwprintf (3)         - formatted wide-character output conversion
vwprintf (3p)        - wide-character formatted output of a stdarg argument list
wprintf (3)          - formatted wide-character output conversion
wprintf (3p)         - print formatted wide-character output

> It takes us to the printf man page

Number 12 - curl
[cs45aa15@mc-redhat01 ~]$ man curl

> curl is a tool to transfer data from data from or to a server.
> It is used to transfer data from a server or to a server. For example user authentication uses curl.

Number 13 - wget
[cs45aa15@mc-redhat01 ~]$ man wget

> wget is a non interactive network downloader.
> wget is a after utility for non interactive download of files from the web

Number 14 - echo $0
[cs45aa15@mc-redhat01 ~]$ echo $0
-bash

 Number 15 - echo $SHELL
[cs45aa15@mc-redhat01 ~]$ echo $SHELL
/bin/bash

Number 16 - echo $PATH
[cs45aa15@mc-redhat01 ~]$ echo $PATH
/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/home/cs45aa15/.local/bin:/home/cs45aa15/bin

Number 17 - pizza
[cs45aa15@mc-redhat01 ~]$ pizza
bash: pizza: command not found...

Number 18 - su - mr-tester
[cs45aa15@mc-redhat01 ~]$ su - mr-tester
Password: 
su: Authentication failure
[cs45aa15@mc-redhat01 ~]$ su - mr-tester
Password: 
Last login: Fri Feb 12 19:02:25 EST 2021 on pts/3
Last failed login: Fri Feb 12 20:21:26 EST 2021 on pts/4
There were 6 failed login attempts since the last successful login.
[mr-tester@mc-redhat01 ~]$ pwd
/home/mr-tester
[mr-tester@mc-redhat01 ~]$ whoami
mr-tester
[mr-tester@mc-redhat01 ~]$ who am i
cs45aa15 pts/4        2021-02-12 19:41 (c-73-222-250-13.hsd1.ca.comcast.net)
[mr-tester@mc-redhat01 ~]$ exit
logout
[cs45aa15@mc-redhat01 ~]$ whoami
cs45aa15

> The difference between whoami and who am i are that whoami only gives the username while who am i gives the pts, time, ip address, and provider

Number 19 - su mr-tester
[cs45aa15@mc-redhat01 ~]$ whoami
cs45aa15
[cs45aa15@mc-redhat01 ~]$ su  mr-tester
Password: 
[mr-tester@mc-redhat01 cs45aa15]$ whoami
mr-tester
[mr-tester@mc-redhat01 cs45aa15]$ who am i
cs45aa15 pts/4        2021-02-12 19:41 (c-73-222-250-13.hsd1.ca.comcast.net)
 
Number 20 - last
[cs45aa15@mc-redhat01 ~]$ last
cs45aa16 pts/9        23-124-109-174.l Fri Feb 12 20:48   still logged in   
cs45aa25 pts/8        c-24-4-38-158.hs Fri Feb 12 20:38   still logged in   
cs45aa17 pts/7        75-37-198-64.lig Fri Feb 12 20:36   still logged in   
cs45aa01 pts/2        99-36-165-99.lig Fri Feb 12 20:23   still logged in   
cs45aa24 pts/6                         Fri Feb 12 19:44   still logged in   
cs45aa24 pts/5        57.68.208.33     Fri Feb 12 19:42   still logged in   
cs45aa15 pts/4        c-73-222-250-13. Fri Feb 12 19:41   still logged in   
cs45aa07 pts/3        c-73-170-131-191 Fri Feb 12 19:32   still logged in   
cs45aa03 pts/3        c-73-71-247-94.h Fri Feb 12 18:58 - 19:08  (00:10)    
cs45aa20 pts/2        c-174-62-74-254. Fri Feb 12 18:28 - 20:09  (01:41)    
cs45aa32 pts/3                         Fri Feb 12 17:04 - 17:05  (00:00)    
cs45aa32 pts/1        c-73-158-55-75.h Fri Feb 12 16:42   still logged in 
...

[cs45aa15@mc-redhat01 ~]$ last mr-tester
mr-teste pts/4                         Thu Feb 11 00:12 - 00:13  (00:00)    
mr-teste pts/3                         Sat Feb  6 21:29 - 01:14  (03:44)    

> User cs45aa04 was logged on for 9 hours and 15 minutes on February 8

Number 21 - pinky
[cs45aa15@mc-redhat01 ~]$ pinky hcampbell
Login    Name                 TTY      Idle   When             Where

[cs45aa15@mc-redhat01 ~]$ pinky -l  hcampbell
Login name: hcampbell                   In real life:  
Directory: /home/hcampbell              Shell:  /bin/bash


Number 22- cal
[cs45aa15@mc-redhat01 ~]$ cal

[cs45aa15@mc-redhat01 ~]$ cal 2020


[cs45aa15@mc-redhat01 ~]$ cal 1999

[cs45aa15@mc-redhat01 ~]$ cal 10 2025

Number 23 - date
[cs45aa15@mc-redhat01 ~]$ date
Fri Feb 12 21:03:14 EST 2021

Number 24 - pwd & dir 
[cs45aa15@mc-redhat01 ~]$ pwd
/home/cs45aa15
[cs45aa15@mc-redhat01 ~]$ dir
1015	  cs45aa15		 cs45aa24  cs45aa32  id:   ply	 return  times	USER
23:34:20  [cs45aa15@mc-redhat01  cs45aa26  folder    Last  popd  source  true

Number 25 - pwd & cd & ls
[cs45aa15@mc-redhat01 tmp]$ cd /tmp; ls -a; pwd; date
.
..
.esd-1000
.font-unix
.ICE-unix
ssh-OvPPV7nW16BG
systemd-private-fec502a6b9904027a522561f4521303d-bolt.service-tak4di
systemd-private-fec502a6b9904027a522561f4521303d-chronyd.service-1UkWBX
systemd-private-fec502a6b9904027a522561f4521303d-colord.service-ZNXfHP
systemd-private-fec502a6b9904027a522561f4521303d-cups.service-trYkC0
systemd-private-fec502a6b9904027a522561f4521303d-fwupd.service-zs8IsP
systemd-private-fec502a6b9904027a522561f4521303d-rtkit-daemon.service-DLJ8yU
.Test-unix
.X0-lock
.X11-unix
.XIM-unix
yum_save_tx.2021-02-03.06-56.gWIkxk.yumtx
yum_save_tx.2021-02-04.06-56.ICh_uK.yumtx
yum_save_tx.2021-02-05.06-53.ND98QB.yumtx
yum_save_tx.2021-02-06.06-53.J6L2YC.yumtx
yum_save_tx.2021-02-07.06-53.fwIQVY.yumtx
yum_save_tx.2021-02-08.06-53.nqZFoe.yumtx
yum_save_tx.2021-02-09.06-56.XWnPCZ.yumtx
yum_save_tx.2021-02-10.06-53.6mHx9k.yumtx
yum_save_tx.2021-02-11.06-53.gTsN1P.yumtx
yum_save_tx.2021-02-12.06-53.pWj8pR.yumtx
/tmp
Fri Feb 12 21:08:44 EST 2021

Number 26 - cd
> The dash gives the shell that I am using
> The 2 dots takes me to the folder my folder was in
> It shows the dot files too.

Number 27 - free
[cs45aa15@mc-redhat01 ~]$ free
              total        used        free      shared  buff/cache   available
Mem:        5944904     1051036      196004      334308     4697864     4261784
Swap:       6160380       57344     6103036
[cs45aa15@mc-redhat01 ~]$ free -h
              total        used        free      shared  buff/cache   available
Mem:           5.7G        1.0G        191M        326M        4.5G        4.1G
Swap:          5.9G         56M        5.8G
[cs45aa15@mc-redhat01 ~]$ free --help ; man free

Usage:
 free [options]

Options:
 -b, --bytes         show output in bytes
 -k, --kilo          show output in kilobytes
 -m, --mega          show output in megabytes
 -g, --giga          show output in gigabytes
     --tera          show output in terabytes
     --peta          show output in petabytes
 -h, --human         show human-readable output
     --si            use powers of 1000 not 1024
 -l, --lohi          show detailed low and high memory statistics
 -t, --total         show total for RAM + swap
 -s N, --seconds N   repeat printing every N seconds
 -c N, --count N     repeat printing N times, then exit
 -w, --wide          wide output

     --help     display this help and exit
 -V, --version  output version information and exit

For more details see free(1).

Number 28 - type
[cs45aa15@mc-redhat01 ~]$ type ls
ls is aliased to `ls --color=auto'
[cs45aa15@mc-redhat01 ~]$ type pwd
pwd is a shell builtin
[cs45aa15@mc-redhat01 ~]$ type date
date is /usr/bin/date

Number 29 - df
[cs45aa15@mc-redhat01 tmp]$ df -h
Filesystem             Size  Used Avail Use% Mounted on
devtmpfs               2.9G     0  2.9G   0% /dev
tmpfs                  2.9G     0  2.9G   0% /dev/shm
tmpfs                  2.9G  315M  2.6G  11% /run
tmpfs                  2.9G     0  2.9G   0% /sys/fs/cgroup
/dev/mapper/rhel-root   50G   11G   40G  22% /
/dev/mapper/rhel-home  243G   66M  243G   1% /home
/dev/sda1             1014M  236M  779M  24% /boot
tmpfs                  581M   40K  581M   1% /run/user/1000
tmpfs                  581M     0  581M   0% /run/user/1032
tmpfs                  581M     0  581M   0% /run/user/1015
tmpfs                  581M     0  581M   0% /run/user/1001
tmpfs                  581M     0  581M   0% /run/user/1017
tmpfs                  581M     0  581M   0% /run/user/1025
tmpfs                  581M     0  581M   0% /run/user/1016
tmpfs                  581M     0  581M   0% /run/user/1007
tmpfs                  581M     0  581M   0% /run/user/1020
[cs45aa15@mc-redhat01 tmp]$ df -hT
Filesystem            Type      Size  Used Avail Use% Mounted on
devtmpfs              devtmpfs  2.9G     0  2.9G   0% /dev
tmpfs                 tmpfs     2.9G     0  2.9G   0% /dev/shm
tmpfs                 tmpfs     2.9G  315M  2.6G  11% /run
tmpfs                 tmpfs     2.9G     0  2.9G   0% /sys/fs/cgroup
/dev/mapper/rhel-root xfs        50G   11G   40G  22% /
/dev/mapper/rhel-home xfs       243G   66M  243G   1% /home
/dev/sda1             xfs      1014M  236M  779M  24% /boot
tmpfs                 tmpfs     581M   40K  581M   1% /run/user/1000
tmpfs                 tmpfs     581M     0  581M   0% /run/user/1032
tmpfs                 tmpfs     581M     0  581M   0% /run/user/1015
tmpfs                 tmpfs     581M     0  581M   0% /run/user/1001
tmpfs                 tmpfs     581M     0  581M   0% /run/user/1017
tmpfs                 tmpfs     581M     0  581M   0% /run/user/1025
tmpfs                 tmpfs     581M     0  581M   0% /run/user/1016
tmpfs                 tmpfs     581M     0  581M   0% /run/user/1007
tmpfs                 tmpfs     581M     0  581M   0% /run/user/1020

Number 30 - du 
[cs45aa15@mc-redhat01 tmp]$ du
[cs45aa15@mc-redhat01 tmp]$ du -sh .
[cs45aa15@mc-redhat01 tmp]$ du -sh *
[cs45aa15@mc-redhat01 tmp]$ du -a
[cs45aa15@mc-redhat01 tmp]$ du  -sh /home
[cs45aa15@mc-redhat01 tmp]$ du -shS / home

>3.2 M