Unix

 

Unix/Linux Command Reference File Commands 1. ls Directory listing 2. ls -al Formatted listing with hidden fles 3. ls -lt Sorting the Formatted listing by time modifcation 4. cd dir Change directory to dir 5. cd Change to home directory 6. wd Show c!rrent wor"ing directory #. m"dir dir Creating a directory dir $. cat %fle &laces the standard in!t into the fle '. more fle (!t!t the contents o) the fle 1*. head fle (!t!t the frst 1* lines o) the fle 11. tail fle (!t!t the last 1* lines o) the fle 12. tail -) fle (!t!t the contents o) fle as it grows+starting with the last 1* lines 13. to!ch fle Create or !date fle 14. rm fle Deleting the fle 15. rm -r dir Deleting the directory 16. rm -) fle Force to remo,e the fle 1#. rm -r) dir Force to remo,e the directory dir 1$. c fle1 fle2 Coy the contents o) fle1 to fle2 1'. c -r dir1 dir2 Coy dir1 to dir2create dir2 i) not resent 2*. m, fle1 fle2 ename or mo,e fle1 to fle2+i) fle2 is an e/isting directory 21. ln -s fle lin" Create symbolic symbolic lin" lin" to fle

&rocess management 1. s 0o dislay the c!rrently wor"ing rocesses 2. to Dislay all r!nning rocess Unix/Linux Command Reference

3. "ill id ill the rocess with gi,en id 4. "illall roc ill all the rocess named roc 5. "ill attern ill "ill all rocesses matching the attern 6. bg ist stoed or bac"gro!nd obs+res!me a stoed  ob in the bac"gro!nd bac"gro!nd #. )g rings the most recent ob to )oregro!nd $. )g n rings ob n to the )oregro!nd

File  ermission ermission 1. chmod octal fle Change the ermission o) fle to octal+which can be )o!nd searately )or !ser+gro!+world by adding+ •

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4-readr7 2-writew7

 

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1-e/ec!te/7

Searching 1. gre attern fle Search )or attern in fle 2. gre -r attern dir Search rec!rsi,ely )or attern in dir 3. command 8 gre attern Search attern in the o!t!t o) a command 4. locate fle Find all instances o) fle 5. fnd . -name flename Searches in the c!rrent directory reresented by a eriod7 and below it+ )or fles and directories with names starting with flename 6. gre attern Searches )or all the named rocesses + that matches with the attern and+ by de)a!lt+ ret!rns their 9D

System 9n)o 1. date Show the c!rrent date and time 2. cal Show this month:s calender 3. !time Show c!rrent !time 4. w Dislay who is on line 5. whoami ho yo! are logged in as Unix/Linux Command Reference

6. fnger !ser Dislay in)ormation abo!t !ser #. !name -a Show "ernel in)ormation $. cat ;roc;c!in)o C! in)ormation '. cat roc;memin)o <emory in)ormation 1*. man command Show the man!al )or command 11. d) Show the dis" !sage 12. d! Show directory sace !sage 13. )ree Show memory and swa !sage 14. whereis a Show ossible locations o) a 15. which a Show which alications will be r!n by de)a!lt

Comression 1. 2. 3. 4. 5. 6. #. $.

tar c) fle.tar fle Create tar named fle.tar containing fle tar /) fle.tar =/tract the fles )rom fle.tar tar c>) fle.tar.g> fles Create a tar with ?>i comression tar />) fle.tar.g> =/tract a tar !sing ?>i tar c) fle.tar.b>2 Create tar with >i2 comression tar /) fle.tar.b>2 =/tract a tar !sing >i2 g>i fle Comresses fle and renames it to fle.g> g>i -d fle.g> Decomresses fle.g> bac" to fle

@etwor" 1. ing host &ing host and o!t!t res!lts 2. whois domain ?et whois in)ormation )or domains

 

3. dig domain ?et D@S in)ormation )or domain 4. dig -/ host e,erse loo"! host 5. wget fle Download fle 6. wget -c fle Contin!e a stoed download Unix/Linux Command Reference

Shortc!ts 1. ctrlAc Balts the c!rrent command 2. ctrlA> Stos the c!rrent command+ res!me with )g in the )oregro!nd or bg in the bac"gro!nd 3. ctrlAd ogo!t the c!rrent session+ similar to e/it 4. ctrlAw =rases one word in the c!rrent line 5. ctrlA! =rases the whole line 6. ctrlAr 0ye to bring ! a recent command #.  eeats the last command $. e/it ogo!t the c!rrent session Unix/Linux Command Reference