UNIX Commands

COPY THE FIRST 10 LINES FROM ONE FILE TO ANOTHER FILE :
sed -e "10q" GDK2120_D1.TXT > GDK2120_D2.TXT

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COUNT THE NUMBER OF FILES IN THE FOLDER :

 ls -1|wc -l    [-ONE & -L]
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CHECKING DISK SPACE :
df -h
or
df -k
or
du -sh

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MIGRATE FOLDERS FROM ONE ENVIRONMENT TO ANOTHER ENVIRONMENT(EX: DEV TO QA)
scp -rp /home/data user@dev.com:/home/data

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CHANGE THE OWNER OF THE FOLDER :
sudo chown -R user /home/data
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TO CHECK FOR THE FILE(GREP)
ls /home/data | grep ^CED_DELTA.*TXT$
ls /home/data | grep CED_DELTA.*TXT$
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to check the process of my own
ps -f -l -uusername
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to convert multiple lines into one single line
awk '{printf("%s",$0)}' HPS_D1120807_142128.TXT > HPS_D1120807_142128_1.TXT
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to convert one single row with delimeters into multiple rows (~ is  a delimeter here)
awk -F"~" '{for(i=1 ;i <= NF;i++ ) {print $i;}}' HPS_D1120807_142128_1.TXT >HPS_D1120807_142128_2.TXT
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to remove the last line from the file
sed '$d' EDISAMPLE_3.TXT > EDISAMPLE_4.TXT

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rename file with one pattern to another pattern
rename  ATTXJZZ  ATTXJGD *.ksh

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touch to change the timestamp of the file
touch -a -m -t 201301181205.09 filename.txt