Utilities to manage Files and Directories

AIX Commands for Managing files and directories

• cd Change directory

• ls Display the content of a directory
  
  • ls -la Display the content of a library long format
  • ls -latr Display the content of a library in chronogical order

• cat Display, create, copy, concat a file
• cat file.input Display file.input
• cat file1.input file2.input > file.outpout Concat file1 et file2

• more Display each page of a file

• cp  Copy files or directories

• mv Move or rename file

• grep Search a string in a file
• grep -r "text" /tmp Search the string text in the /tmp directory

• wc Count word, line in a file

• ln Make a hard or soft link of a file

• touch Create an empty file

• find Find a file
• find . -name "text.txt" Find the file text.txt
• find . -name "*.txt" | xargs -n1 ls -la Find the files *.txt if there is too many occurences 
• find . -name "text*" | xargs rm Find all the file with the argument text* and remove it
•  find . -type f -mtime +10 | xargs -n1 rm Find all files older than 10 days and remove it

• chmod Modify the permission of a file or directory
• chmod ugo+rwx Set the permission for user - group - other + Read - Write - execute

• chown Change the owner of a file or directory
• chown user file

• chgrp Change the group of a file or directory
• chgrp group file

• cut Cut certain colonn of a file

• head Display the head of a file

• sdiff Display the difference between two files

• sort Sort the content of a file

• tail Display the last lines of a file
• tail -f /var/log/error.log Display in "real time" the content of a log file

• mkdir Make a directory

• rmdir Remove a directory

• nl Number lines in a file
• nl -ba file.txt

AIX utlitites - Transforming and converting files

 Here are listed some "utilities" with example to transform files.

• tr
• tr '\332' '012'< file.input > file.output To transform character 'DA' (hex) to '0A' (hex). The value 332 and 012 are in octal
• tr -d '\025' < file.input > file.output To delete the character '15' (hex). The value 025 are in octal
• tr 'A-Z' 'a-z' < file.input > file.output To transform upercase to lowercase
• tr 'àçéèêëîïôöùüÂÇÉÈÊËÎÏÔÖÙÜ' 'aceeeeiioouuACEEEEIIOOUU' < file.input > file.output

• sed
• sed

• perl
• perl -pe 's/\332/\012/g' < file.input > file.output To transform character 'DA' (hex) to '0A' (hex). The value 332 and 012 are in octal
• perl -pe 's/\332/\015\012/g' < file.input > file.output To transform character 'DA' (hex) to '0D0A' (hex. Thel value 332, 015 and 012 are in octal.
• perl -n -e 'chop; printf "%-120s\n",$_;'  < file.input > file.output To transform a file with a Carriage Return at the position 120
• perl -e '1,2d' < file.input > file.output To suppress the first two line of a file
• perl -e 'while (read(STDIN, $l, 160)){printf "%s\n",$l;}' < file.input >file.output To add a carriage return at the position 160

• iconv To convert from one encoding to another encoding
• iconv -f ISO8859-1 -t IBM-850 file.input > file.output To convert file from ISO8859-1 to IBM-850 encoding

• awk
• ls -la * | tail -1 | awk '{print $9}' To display information of the colon 9 in a ls command
• ls -ltr | grep "Jan 24" | awk '{print $9}' | xargs -n1 -i cp {} /work/toto/
• dd
• dd if=/tmp/file.input of=/tmp/file.output conv=ascii To convert input file from bin to ascii

• Sript to transform "dos file" to Unix (in particular ^M)
• #!/usr/bin/ksh
  
  if [ $# -ne 1 ]
  then
  echo "Usage: $0 filename"
  exit
  fi
  
  sed 's/^M$//' $1 > tmp
  mv tmp $1
  chmod 755 $1

• Tips to transform Dos file to Unix

• # to convert DOS file to Unix in place:
• perl -i -pe 's/\r//g' file
• # Unix to DOS:
• perl -pe 's/$/\r/g' < infile > outfile
• # Unix to DOS in place:
• perl -i -pe 's/\n/\r\n/' file
• # to check for <CR> :
• perl -ne 'print if /\r/' < infile