IBM AIX

DBA Related commands:-

Finding files (find command)

Use the find command to recursively search the directory tree for each specified Path, seeking files that match a Boolean expression written using the terms given in the following text.

The output from the find command depends on the terms specified by the Expression parameter.

The following are examples of how to use the find command:

·         To list all files in the file system with the name .profile, type the following:

find / -name .profile

Below command need to find  sonu file location.

bash-4.2$ find / -name sonu 2>/dev/null

This searches the entire file system and writes the complete path names of all files named .profile. The slash (/) tells the find command to search the /(root) directory and all of its subdirectories.

To save time, limit the search by specifying the directories where you think the files might be.

·         To list files having a specific permission code of 0600 in the current directory tree, type the following:

find . -perm 0600

This lists the names of the files that have only owner-read and owner-write permission. The dot (.) tells the find command to search the current directory and its subdirectories. For an explanation of permission codes, see the chmod command.

·         To search several directories for files with certain permission codes, type the following:

find manual clients proposals -perm -0600

This lists the names of the files that have owner-read and owner-write permission and possibly other permissions. The manual, clients, and proposals directories and their subdirectories are searched. In the previous example, -perm 0600 selects only files with permission codes that match 0600 exactly. In this example, -perm -0600 selects files with permission codes that allow the accesses indicated by 0600 and other accesses above the 0600 level. This also matches the permission codes 0622 and 2744.

·         To list all files in the current directory that have been changed during the current 24-hour period, type the following:

find . -ctime 1

·         To search for regular files with multiple links, type the following:

find . -type f -links +1

This lists the names of the ordinary files (-type f) that have more than one link (-links +1).

Note: Every directory has at least two links: the entry in its parent directory and its own .(dot) entry. 

·         To search for all files that are exactly 414 bytes in length, type the following:

find . -size 414c

How to check Mount Point

bash-3.2$ df -g

Filesystem    GB blocks      Free %Used    Iused %Iused Mounted on

/dev/hd4           5.00      2.63   48%     6665     2% /

/dev/hd2           5.00      0.66   87%    48058    24% /usr

/dev/hd9var        5.00      3.51   30%    18638     3% /var

/dev/hd3           5.00      4.19   17%      424     1% /tmp

AIX version 

function aixversion {
  OSLEVEL=$(oslevel -s)
  AIXVERSION=$(echo "scale=1; $(echo $OSLEVEL | cut -d'-' -f1)/1000" | bc)
  AIXTL=$(echo $OSLEVEL | cut -d'-' -f2 | bc)
  AIXSP=$(echo $OSLEVEL | cut -d'-' -f3 | bc)
  echo "AIX ${AIXVERSION} - Technology Level ${AIXTL} - Service Pack ${AIXSP}"
}
aixversion

Example output:

AIX 7.1 - Technology Level 3 - Service Pack 1

General Commands

id - displays the system identity of the user lslicense - list maximum number of users last - information about previous logins w - lists summary of current users who - displays information about all current users uname - displays system info type - shows path location whereis - shows path location what - displays header information about the source file whatis - displays a short description of a function basename - returns the base file name ac - displays connect time date - displays or sets the date timex - displays the elapsed time cmp - compares two files diff - compares text files head or tail - display start or end of file od - dumps the contents of a file split - makes smaller files from a large one cut - cuts out selected text tr - translates characters sed - stream edit command to change text nl - produces an OUTPUT file by inserting the line number captoinfo - converts termcap to terminfo nvdmetoa - convert EBCDIC files to ASCII sum - displays checksum for a file errclear - deletes entries in the error log errpt - generates an error report diag - performs hardware problem determination trace - kernel debugging at - schedules jobs batch - run 1 or more jobs in the background nice - execute a command at a lower priority tee - used to preserve output from a pipeline find - finds files with matching expressions grep - searches a file for a pattern login logout su - switch user kill - stop a process stopsrc - gracefully shuts down all subsystems shutdown - shutdown system fastboot - restarts the system without running fsck fasthalt - halts the system lsitab - list contents of the /etc/inittab file rmitab - removes an entry from the /etc/inittab telinit - forces the init process to re-read the /etc/inittab strip - removes symbol table xargs - constructs an argument list find Finds files with matching expressions. Note: If the following error message is generated find: 0652-081 cannot change directory to </transfer/printers>: file access permissions do not allow the specified action. This means that the user you are currently logged in as (even root) doesn't have the authority to READ that directory. Examples What it does find / -name jan92.rpt -print Search all file systems for any file named jan92.rpt find / -size +1000k -exec ls -l {} \; -print Searches all file systems to report back those files larger than 1MB in size find / -size 0 -print Find all files of ZERO length find / -type f -exec grep bananas {} \; -print Searches all plain files to determine if the string 'bananas' is contained within it find /usr/lpp/FINANCIALS -print | xargs chown roger.staff Changes the ownership of all files under /usr/lpp/FINANACIALS to be owned by user roger and have a group ownership of staff. find / -user roger -print Find all files owned by user roger find / -nouser -print Displays all unowned files in the system find / -group staff -print Find all files owned by group staff find / -nogroup staff -print List all files that belong to a non-existent group not found in /etc/group find . -perm 600 -print | xargs chmod 666 Find all the files that have READ/WRITE permissions set for the owner of a file and change those permissions to READ/WRITE for everybody. find / -mtime +100 -print Search all file systems for files that have not be modified in over 100 days. find . -mtime 0 -print List all files in the current directory that have changed during the current 24 hour period. find / -name /transfer -prune -o -print List the name of all files from the / (root) directory except for the NFS file system named /transfer find . -name PERSONAL -prune -o -print List the name of all files in or below the current directory, except the directory named PERSONAL or files in that directory. find / -fstype nfs -print List the name of all the files that reside in an NFS file system find . -newer disk.log -print Display all files that have been modified more recently than the file named disk.log grep Searches a file for a pattern. Grep stands for Global Regular Expression Printer Examples What it does grep -i WhereIs * Search all files in current directory to determine if the string 'WhereIs' is contained within it. The -i option ignores the case of letters (WhereIs is same as whereis) lsdev -C|grep lp List all configured printers grep [0-9][A-Z] *.doc List any file that has a .doc suffix that contains a number (0-9) followed by a capital letter (A-Z). grep [^0-5][A-Z] *.doc List any file that has a .doc suffix that contains any number except 0 to 5 and is followed by a capital letter (A-Z) grep "^IBM" *.doc Displays lines that BEGIN with the word IBM grep "IBM$" *.doc Displays lines that END with the word IBM grep "^IBM is GREAT$" *.doc Displays only those lines that consist of the phrase 'IBM IS GREAT' grep -v "^ *$" testfile > goodfile Removes all the blank lines from the source file 'testfile' and redirects the output to a new file named 'goodfile'.