Hi,
I have a comma delimited text file where character fields (as opposed to numeric and date fields) are always enclosed with double quotes. Records are separated by the newline character. In a shell script I would like to split a particular field into two separate fields (enclosed with double... (4 Replies)
Hi,
I have a file that has data in it that says
00:01:48.233 1212
00:01:56.233 345
00:09:01.221 5678
00:12:23.321 93444
The file has more line than this but i just wanted to put in a snippet to ask how I would get the highest number with time stamp into another file. So from the above... (2 Replies)
I'm trying extract a number of filename fields from a log file and copy them out as separate rows in a text file so i can load them into a table. I'm able to get the filenames but the all appear on one line. I tried using the cut command with the -d (delimiter) option but cant seem to make it... (1 Reply)
Hello,
I'm trying to get a value based on a comparison of two fields, this is:
file1
687.45
687.18
687.322
687.405
686.865
file 2
685 6.43
686 6.43
687 6.42
688 6.42 (3 Replies)
Hi experts,
I need to print the first field first then last two fields should come next and then i need to print rest of the fields.
Input :
a1,abc,jsd,fhf,fkk,b1,b2
a2,acb,dfg,ghj,b3,c4
a3,djf,wdjg,fkg,dff,ggk,d4,d5
Expected output:
a1,b1,b2,abc,jsd,fhf,fkk... (6 Replies)
I have a csv dump from sql server that needs to be converted so it can be feed to another program. I already sorted on field 1 but there are multiple columns with same field 1 where it needs to be compared against and if it is same then append field 5.
i.e from
ANG SJ,0,B,LC22,LC22(0)
BAT... (2 Replies)
I have a .CSV file (file.csv) whose data are all enclosed in double quotes. Sample format of the file is as below:
column1,column2,column3,column4,column5,column6, column7, Column8, Column9, Column10
"12","B000QRIGJ4","4432","string with quotes, and with a comma, and colon: in... (3 Replies)
I have a fileA with one column (1000 rows), and fileB with 26 columns(13000 rows).
I need to search each value of fileA with fileB and return all the 26 values from FileB to a new file- File C if matches. The search value (from FileA) may present in any of the 26 values in FileB. This value is not... (7 Replies)
Hi All,
I need to extract a position in the file and multiple the value by 1000 and the replace it .
Original
0010001200084701217637306521200000000000010010000000 ---> 000847 * 1000
0010012700086001213437404323000000000000001001000000 ---> 000860 * 1000... (2 Replies)
Discussion started by: arunkumar_mca
2 Replies
LEARN ABOUT MINIX
chmem
CHMEM(1) General Commands Manual CHMEM(1)NAME
chmem - change memory allocation
SYNOPSIS
chmem [+] [-] [=] amount file
EXAMPLES
chmem =50000 a.out # Give a.out 50K of stack space
chmem -4000 a.out # Reduce the stack space by 4000 bytes
chmem +1000 file1 # Increase each stack by 1000 bytes
DESCRIPTION
When a program is loaded into memory, it is allocated enough memory for the text and data+bss segments, plus an area for the stack. Data
segment growth using malloc , brk , or sbrk eats up stack space from the low end. The amount of stack space to allocate is derived from a
field in the executable program's file header. If the combined stack and data segment growth exceeds the stack space allocated, the pro-
gram will be terminated.
It is therefore important to set the amount of stack space carefully. If too little is provided, the program may crash. If too much is
provided, memory will be wasted, and fewer programs will be able to fit in memory and run simultaneously. MINIX does not swap, so that
when memory is full, subsequent attempts to fork will fail. The compiler sets the stack space to the largest possible value (for the Intel
CPUs, 64K - text - data). For many programs, this value is far too large. Nonrecursive programs that do not call brk , sbrk , or malloc ,
and do not have any local arrays usually do not need more than 8K of stack space.
The chmem command changes the value of the header field that determines the stack allocation, and thus indirectly the total memory required
to run the program. The = option sets the stack size to a specific value; the + and - options increment and decrement the current value by
the indicated amount. The old and new stack sizes are printed.
SEE ALSO install(1), brk(2).
CHMEM(1)
05-10-2019
