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Ranjith srt
Ranjith srt

Posted on

Harsha - lix

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touch file1
cp file1 file2
mkdir dir1
cd
pwd
ls

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abs - cd dir1/file1

rls - cd home
cd dir1
cd file1

cd .. - 1 step backward

cd ../.. - 2 srep backward

cd - - previous dir/folder

cd - home

cd ~ - home

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cp file1 file2 - file
cp -r dir1 dir2 - directory

find -name dir1
find .-name dir1

find -name file1

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ln -s file1 soft-link
ln file1 hard-link

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find h*
find ?ello
find hello[0-9]

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ls -l - option

ls -la - multi option

ls -l hosts - argument's

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sudo useradd ak - create user
sudo passwd ak - set passwprd
cat/etc/passwd - verify user create or not
su ak - swith to ak user
passwd - change ak user password
whoami
pwd

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vi file1
i - insert
ESCPE
:wq - write and save
:q! - not save
:q - quit
dd - delete line
shift + z - press z 2 times - save and quit

cat > file1
"HI iam updated"

cat>> file1
"HI iam updated by append"

echo "HI iam updated" > file1
echo "HI iam updated by append" >> file1

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vi file1
i - insert
ESCPE
:wq - write and save
:q! - not save
:q - quit
dd - delete line
u- replace
x - 1 word dlt
/g - search
:set nu -set numbers
shift + z - press z 2 times - save and quit

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cat file1 - display file contents
more sample.txt - 100vh
less sample.txt - 100vh
q -quit

head file1 - 1st 10 lines
head -n 5 file1 - 1 to 5

tail file1 - last 10 lines
tail -n 5 file1 - last 5

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whatis ls
ls --help
man ls

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chmod u-r sample.txt
chmod u+w sample.txt
chmod u-e sample.txt

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chmod 444 - r
chmod 777 - rwe

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chgrp root file_updated
chown root file_updated

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ls -l | tail ls-l input | tail output ls last lines display
ls -l | head

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grep g file1
grep -i g file1
grep 4 file1

grep -n g file1

grep -v g file1

egrep "one|two" file1

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ls -l

ls -l | sort

ls -l | sort -r

sort file1

sort file1 | uniq

sort file1 | uniq -c

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change ownership :

sudo su
chown root file1

group ownership :
chgrp root file11

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tar -cvf sample.txt sample

qzip sample.tar - compress

qzip -d sample.tar.gz - extract

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sudo useradd ak
sudo passwd ak123

sudo useradd -u 1000 ak - user id

sudo usermod --login ak ajith - rename user

sudo usermod -s /bin/cshell ajith - change shell

sudo userdel ak - delt user

sudo groupdel ak - delt group

sudo userdel -r ak - delt single commend

sudo visudo - ediror

ak ALL = (ALL: ALL) ALL

sudo cat/etc/passwd - verify user

sudo cat/etc/shadow - verify password

sudo cat/etc/group - verify group

su ak

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users

wall
Hiii..Hellooooooo

ctrl+D

write ak

Hiii..Hellooooooo
Hiii..Hellooooooo

ctrl+D

hostname :

cat/etc/hostname

sudo vi/cat/etc/hostname

sudo init 6

restart

password schedule:
sudo chage --maxdays 30 ubuntu

sudo chage -w 3 ubuntu

sudo chage -d -1 ubuntu

sudo chage -lastday 0 ubuntu

dls password expired:
sudo chage --1 list ubuntu

log :

cd/var/log

monitor commend :

who
w
id
id ak

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networking :

ip link show
ip i

ip address show
ip a

ip route show
ip r

cat/etc/resolv.conf

Is /etc/sysconfig/network-scripts/

cat /etc/sysconfig/network-scripts/ifcfg-eth0

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sudo ip route add 192.11.12.31 via

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