3 Command to perform Character level Operation on Files
1 . tr Command ‘tr’: Translate, squeeze, and/or delete characters Synopsis: tr [OPTION]… SET1 [SET2] ‘tr’ copies standard input to standard output, performing one of the following operations:
1 . tr Command ‘tr’: Translate, squeeze, and/or delete characters Synopsis: tr [OPTION]… SET1 [SET2] ‘tr’ copies standard input to standard output, performing one of the following operations:
1. cut Command ‘cut’ writes to standard output selected parts of each line of each input file, or standard input if no files are given or for a file name of ‘-‘. Synopsis: cut OPTION… [FILE]… In the table which follows, the BYTE-LIST, CHARACTER-LIST, and FIELD-LIST...
EMail Posts / Feed / Linux Admin / Linux Disk Management
by Ramdev · Published October 7, 2015 · Last modified October 10, 2015
This tool, derived from util-linux’ partx, reads partition tables on specified device and create device maps over partitions segments detected. It is called from hotplug upon device maps creation and deletion. kpartx [-a | -d | -l] [-v] wholedisk Usage Example To mount all the partitions...
EMail Posts / Feed / Linux Admin / Linux Disk Management
by Ramdev · Published October 6, 2015 · Last modified July 30, 2016
Introduction RAID devices are virtual devices created from two or more real block devices. This allows multiple devices (typically disk drives or partitions thereof) to be combined into a single device to hold (for example) a single filesystem. Some RAID levels include redundancy and so can...
How are you doing? Below is the quick recap of posts that we published in September
EMail Posts / Linux Admin / Linux Booting / RHEL7
by Ramdev · Published October 5, 2015 · Last modified August 5, 2016
Introduction dracut – low-level tool for generating an initramfs image Create an initramfs for the kernel with the version . If is omitted, then the version of the actual running kernel is used. If is omitted or empty, then the default location /boot/initramfs-.img is used.
1. Introduction to Partitioning Parted is a program to manipulate disk partitions. It supports multiple partition table formats, including MS-DOS and GPT. It is useful for creating space for new operating systems, reorganising disk usage, and copying data to new hard disks.
‘tail’ prints the last part (10 lines by default) of each FILE; it reads from standard input if no files are given or when given a FILE of ‘-‘. Synopsis: tail [OPTION]… [FILE]… If more than one FILE is specified, ‘tail’ prints a one-line header consisting...
‘fold’ writes each FILE (‘-‘ means standard input), or standard input if none are given, to standard output, breaking long lines. Synopsis: fold [OPTION]… [FILE]… By default, ‘fold’ breaks lines wider than 80 columns. The output is split into as many lines as necessary. ‘fold’...
by Ramdev · Published September 30, 2015 · Last modified September 29, 2015
‘numfmt’ reads numbers in various representations and reformats them as requested. The most common usage is converting numbers to/from _human_representation (e.g. ‘4G’ ==> ‘4,000,000,000’). numfmt [OPTION]… [NUMBER] ‘numfmt’ converts each NUMBER on the command-line according to the specified options (see below). If no NUMBERs...
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